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List of Freshwater Fishes reported from Bolivia
(landlocked)

n = 438
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Table 1: 418 species currently present in the country/island (endemic, native, introduced, reintroduced);
Table 2: 13 species possibly present in the country/island (stray, questionable);
Table 3: 7 species demonstrated to be absent in the country/island (extirpated, not established, misidentification, error).
Table 4: 438 species reported from the country/island altogether.
Table : 438 .
     
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Family Species Author Info Occurrence Common names Abundance Max length Maturity Remark Photo
Anostomidae Abramites hypselonotus (Günther, 1868) Fr native   14.00 cm TL male/unsexed  Known from Arroyo Aguas Negras (Ref. 26654). Museum: Río Guaporé, near Costa Marquez, USNM 278282 (Ref. 9743). 
Doradidae Acanthodoras cataphractus (Linnaeus, 1758) Fr native   11.50 cm SL male/unsexed   
Cichlidae Acaronia nassa (Heckel, 1840) Fr native   16.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Acestrorhynchidae Acestrorhynchus pantaneiro Menezes, 1992 Fr native   35.20 cm TL male/unsexed   
Characidae Acrobrycon ipanquianus (Cope, 1877) Fr native   12.00 cm SL male/unsexed  Known from Departamento Tarija, southern Bolivia (Ref. 38597). Recorded from río Lipeo, west branch of the río Bermejo, Tarija (Ref. 34079). Found in the Amazon basin (Ref. 94771). 
Characidae Acrobrycon ortii Arcila, Vari & Menezes, 2014 Fr native   6.13 cm SL male/unsexed  Known from the northwestern portions of the Río La Plata basin (Ref. 94771).  No picture yet.
Characidae Acrobrycon starnesi Arcila, Vari & Menezes, 2014 Fr native   7.25 cm SL male/unsexed  Known from Río Thyumayu, a tributary of the Río Azero, in the western portion of the Amazon basin (Ref. 94771)  No picture yet.
Cichlidae Aequidens tetramerus (Heckel, 1840) Fr native   19.20 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36377). Also Ref. 4537. 
Cichlidae Aequidens viridis (Heckel, 1840) Fr native   16.50 cm SL male/unsexed  Occurs in the Guaporé River, Amazon River basin (Ref. 36377). Also Ref. 4537. 
Doradidae Agamyxis pectinifrons (Cope, 1870) Fr native   15.00 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Auchenipteridae Ageneiosus inermis (Linnaeus, 1766) Fr native   64.80 cm TL male/unsexed   
Auchenipteridae Ageneiosus intrusus Ribeiro, Rapp Py-Daniel & Walsh, 2017 Fr native   27.91 cm SL male/unsexed  Known from Rio Manuripi at playa outside lagoon, Pando (Ref. 124585).  No picture yet.
Auchenipteridae Ageneiosus vittatus Steindachner, 1908 Fr native   22.00 cm SL male/unsexed    No picture yet.
Triportheidae Agoniates anchovia Eigenmann, 1914 Fr native   14.80 cm SL male/unsexed    No picture yet.
Aspredinidae Amaralia hypsiura (Kner, 1855) Fr native   13.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Doradidae Amblydoras affinis (Kner, 1855) Fr native   13.20 cm SL male/unsexed   
Crenuchidae Ammocryptocharax elegans Weitzman & Kanazawa, 1976 Fr native   3.25 cm SL male/unsexed  Recorded from the Amazon river (Ref. 13683). Also Ref. 37059. 
Rivulidae Anablepsoides beniensis (Myers, 1927) Fr native   4.00 cm TL male/unsexed  Known from the Mamoré-Guaporé River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides bibosi Valdesalici & Gil, 2019 Fr native   3.72 cm SL male/unsexed ;3.41 cm SL female  Type locality of Anablepsoides bibosi, Dept.Cochabamba, Provincia Tiraque, arroyo Bibosi, near Villa Tunari, Rio Chapare drainage, Known from the type locality, a stream belonging to the Rio Chapare drainage, a tributary of the Rio Mamoré, Rio Madeira subbasin, Amazon basin, Depart. Cochabamba (Ref. 130459).  No picture yet.
Rivulidae Anablepsoides chapare Valdesalici & Gil, 2017 Fr native   3.69 cm SL male/unsexed ;3.42 cm SL female  Type locality of Anablepsoides chapare, Departamento Cochabamba, Chapare Province, Isiboro River drainage, tributary of Río Mamoré, Rio Madeira subbasin, Amazon basin (Ref. 130460).  No picture yet.
Doradidae Anadoras weddellii (Castelnau, 1855) Fr native   15.00 cm SL male/unsexed  Found in Chiquitos (Ref. 6868). 
Engraulidae Anchoviella carrikeri Fowler, 1940 Fr native   6.50 cm SL male/unsexed   
Loricariidae Ancistrus bolivianus (Steindachner, 1915) Fr native   8.80 cm SL male/unsexed  Found in Beni and Mamoré River basins (Ref. 36713). Type locality, Rio Songo [=Zongo], North Yungas (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus megalostomus Pearson, 1924 Fr endemic   8.30 cm SL male/unsexed  Known from Beni River basin in Madeira River drainage (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus montanus (Regan, 1904) Fr endemic   9.20 cm SL male/unsexed  Known from Beni River basin in the upper Madeira River drainage (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Aphanotorulus emarginatus (Valenciennes, 1840) Fr native   33.60 cm TL male/unsexed   
Loricariidae Aphanotorulus unicolor (Steindachner, 1908) Fr native   13.90 cm SL male/unsexed   
Characidae Aphyocharacidium bolivianum Géry, 1973 Fr native   3.38 cm SL male/unsexed  Known from the Mamoré River basin (Ref. 38376). Also Ref. 598.  No picture yet.
Characidae Aphyocharax alburnus (Günther, 1869) Fr native   8.00 cm male/unsexed  Known from the Amazon River basin (Ref. 38382). 
Characidae Aphyocharax gracilis Fowler, 1940 Fr native   5.40 cm SL male/unsexed  Known from the Paraguay River basin (Ref. 38382).  No picture yet.
Characidae Aphyocharax nattereri (Steindachner, 1882) Fr native   3.10 cm SL male/unsexed  Known from Paraguay basin (Ref. 598). 
Rivulidae Aphyolebias claudiae Costa, 2003 Fr native    Type locality, Temporary pool at río San Pablo floodplains, on road Santa Cruz-Trinidad, río Guaporé basin, ca. 15°37'S, 63°35'W, Depart. Santa Cruz (Ref. 54621).  No picture yet.
Rivulidae Aphyolebias obliquus (Costa, Sarmiento & Barrera, 1996) Fr native   4.80 cm SL male/unsexed  Known from Rio Mamore basin in a temporary swamp (bajío) connected to Arroyo Curiraba. 
Cichlidae Apistogramma amoena (Cope, 1872) Fr native   6.30 cm TL male/unsexed ;6.00 cm female  Also Ref. 7020.  No picture yet.
Cichlidae Apistogramma erythrura Staeck & Schindler, 2008 Fr native   4.34 cm SL male/unsexed   
Cichlidae Apistogramma inconspicua Kullander, 1983 Fr native   3.80 cm SL male/unsexed ;4.00 cm female  Type locality: Dept. Santa Cruz, R. Paraguay system, small pool of the R. Candelaria, above bridge on road Carmen-Santa Rosa, IRSNB 637 (holotype of Apistogramma inconspicua, 2.97 cm SL, male) (Ref. 86502). Known from the Amazon River basin, in the Guaporé River drainage (Ref. 36377). Also Ref. 12251. 
Cichlidae Apistogramma linkei Koslowski, 1985 Fr endemic   3.90 cm SL male/unsexed ;4.00 cm female  Known from the Amazon River basin, in the Mamoré and Beni River basins (Ref. 36377). Type locality: Northwest of the Town Santa Cruz, ca. 16°20'S, 68°25'W to 16°15'S, 68°50'W, Bolivia (Ref. 12965). 
Cichlidae Apistogramma luelingi Kullander, 1976 Fr native   3.30 cm SL male/unsexed ;2.87 cm SL female  Known from the Mamoré River basin of the Amazon River basin (Ref. 36377). 
Cichlidae Apistogramma rubrolineata Hein, Zarske & Zapata, 2002 Fr native  scarce (very unlikely) 4.00 cm SL male/unsexed  Species has potential for ornamental trade. Type locality: Rio Manuripi near Monte Carlo (Ref. 48504). 
Cichlidae Apistogramma similis Staeck, 2003 Fr native    Known from small river that empties in the Laguna La Brava, Rio Yata system in Beni province (Ref. 55839). 
Cichlidae Apistogramma sororcula Staeck & Schindler, 2016 Fr native   4.17 cm SL male/unsexed  Type locality of Apistogramma sororcula from Depto. Beni, rio San Martin, approx. 5 km upstream of the village Bella Vista; MTD-F 33580 (Ref. 129299).  No picture yet.
Cichlidae Apistogramma staecki Koslowski, 1985 Fr native   2.10 cm SL male/unsexed ;4.00 cm female  Known from Rio Marmore system (Ref. 12251). Type locality: South of the town of Trinidad, Bolivia, ca. 14°57'S, 64°51'W (Ref. 12965). 
Cichlidae Apistogramma trifasciata (Eigenmann & Kennedy, 1903) Fr misidentification   3.80 cm SL male/unsexed ;4.60 cm female  Known from Rio Guapore (Ref. 12251). Occurrence in the country not confirmed (Ref. 36377). 
Apteronotidae Apteronotus albifrons (Linnaeus, 1766) Fr native   50.00 cm TL male/unsexed   
Astroblepidae Astroblepus longiceps Pearson, 1924 Fr native   6.00 cm SL male/unsexed  Known from the Madeira River basin (Ref. 37058). Found in Rio Colorado, Laixo Bopi (Ref. 6868).  No picture yet.
Astroblepidae Astroblepus stuebeli (Wandolleck, 1916) Fr native   8.00 cm SL male/unsexed  Known from the Lake Titicaca basin (Ref. 37058).  No picture yet.
Doradidae Astrodoras asterifrons (Kner, 1853) Fr native   12.50 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Cichlidae Astronotus crassipinnis (Heckel, 1840) Fr native   24.00 cm SL male/unsexed  Known from the Amazon River (Ref. 36377). 
Characidae Astyanax boliviensis Ruiz-C., Román-Valencia, Taphorn, Buckup & Ortega, 2018 Fr native   8.95 cm SL male/unsexed  Type locality of Astyanax boliviensis, La Paz, Iturralde Province, Amazon River Basin, Madeira-Beni-MadidiCandelaria River drainages, Candelaria River at La Candelaria (Ref. 119406). 
Characidae Astyanax chaparae Fowler, 1943 Fr native      No picture yet.
Characidae Astyanax multidens (Pearson, 1924) Fr native   14.00 cm TL male/unsexed  Also Ref. 598. 
Characidae Astyanax villwocki Zarske & Géry, 1999 Fr native   11.40 cm SL male/unsexed  Recorded from the Rio Beni and the Rio Mamoré. 
Auchenipteridae Auchenipterus ambyiacus Fowler, 1915 Fr native   24.40 cm SL male/unsexed   
Auchenipteridae Auchenipterus brachyurus (Cope, 1878) Fr native   16.50 cm SL male/unsexed  Known from the Amazon River (Ref. 37098).  No picture yet.
Rivulidae Austrolebias accorsii Nielsen & Pillet, 2015 Fr native    Type locality of Austrolebias accorsii, Departamento de Santa Cruz de La Sierra, temporary pool, upper Rio Grande, upper Río Mamoré, Amazon basin (Ref. 119764, 129129).  No picture yet.
Pseudopimelodidae Batrochoglanis raninus (Valenciennes, 1840) Fr native   20.00 cm SL male/unsexed   
Belonidae Belonion apodion Collette, 1966 Fr native   5.00 cm SL male/unsexed  Type locality, Laguna 3 km southwest of Costa Marques, Rio Guaporé, Bolivia at Brazil-Bolivia boundary, AMNH 20805 (Ref. 26282, 30923). 
Cichlidae Biotodoma cupido (Heckel, 1840) Fr native   11.70 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Characidae Brachychalcinus copei (Steindachner, 1882) Fr native   9.00 cm TL male/unsexed   
Hypopomidae Brachyhypopomus alberti Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Cuchillo (Spanish)  11.10 cm TL male/unsexed ;10.00 cm TL female  Known from the lower río Beni (Ref. 116763).  No picture yet.
Hypopomidae Brachyhypopomus arrayae Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Cuchillo (Spanish)  16.00 cm TL male/unsexed ;13.30 cm TL female  Known from the upper Madeira River basin; most records from the rio Beni (Ref. 116763).  No picture yet.
Hypopomidae Brachyhypopomus beebei (Schultz, 1944) Fr native   32.00 cm SL male/unsexed   
Hypopomidae Brachyhypopomus bennetti Sullivan, Zuanon & Cox Fernandes, 2013 Fr native   23.20 cm TL male/unsexed  Known from the Río Beni drainage (Ref. 94132). 
Hypopomidae Brachyhypopomus brevirostris (Steindachner, 1868) Fr native   34.70 cm TL male/unsexed    No picture yet.
Hypopomidae Brachyhypopomus pinnicaudatus (Hopkins, 1991) Fr native   18.60 cm TL male/unsexed   
Hypopomidae Brachyhypopomus sullivani Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native   15.20 cm TL male/unsexed ;12.70 cm TL female    No picture yet.
Pimelodidae Brachyplatystoma filamentosum (Lichtenstein, 1819) Fr native   360 cm TL male/unsexed   
Pimelodidae Brachyplatystoma juruense (Boulenger, 1898) Fr questionable   60.00 cm TL male/unsexed   
Pimelodidae Brachyplatystoma platynema Boulenger, 1898 Fr native   100.00 cm SL male/unsexed   
Pimelodidae Brachyplatystoma rousseauxii (Castelnau, 1855) Fr native   192 cm TL male/unsexed   
Pimelodidae Brachyplatystoma vaillantii (Valenciennes, 1840) Fr native   150 cm TL male/unsexed   
Heptapteridae Brachyrhamdia marthae Sands & Black, 1985 Fr native   7.60 cm SL male/unsexed    No picture yet.
Bryconidae Brycon cephalus (Günther, 1869) Fr native   45.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 38504). 
Bryconidae Brycon melanopterus (Cope, 1872) Fr native   38.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38504). 
Characidae Bryconacidnus ellisae (Pearson, 1924) Fr native   3.80 cm SL male/unsexed  Recorded from the Rio Beni. 
Characidae Bryconacidnus hemigrammus (Pearson, 1924) Fr native   4.00 cm SL male/unsexed  Known from the Upper Madeira River basin (Ref. 38376).  No picture yet.
Characidae Bryconamericus bolivianus Pearson, 1924 Fr native   6.80 cm SL male/unsexed  Recorded from Rio Beni.  No picture yet.
Characidae Bryconamericus thomasi Fowler, 1940 Fr native   7.00 cm SL male/unsexed  Found in the Paraguay River basin (Ref. 38376).  No picture yet.
Cichlidae Bujurquina beniensis Careaga, Miranda, & Carvajal-Vallejos, 2023 Fr native   9.22 cm SL male/unsexed  Type locality of the holotype of Bujurquina beniensis: Río Beni drainage, Nuevo Tunari community’s stream, Amazon basin, La Paz (Ref. 128932).  No picture yet.
Cichlidae Bujurquina mabelae Careaga, Miranda, & Carvajal-Vallejos, 2023 Fr native   7.12 cm SL male/unsexed  Type locality of the holotype of Bujurquina mabelae: Rio San Pedro, Río Mamoré drainage, Amazon basin, Cochabamba (Ref. 128932).  No picture yet.
Cichlidae Bujurquina oenolaemus Kullander, 1987 Fr native   6.70 cm SL male/unsexed  Known from the Aguas Calientes River basin (Paraguay River drainage) of the Paraná River basin (Ref. 36377). Type locality: Río Aguascalientes, at Aguascalientes, ca. 25 km east of Roboré, Dept. Santa Cruz. 
Aspredinidae Bunocephalus aleuropsis Cope, 1870 Fr native   9.10 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695).  No picture yet.
Aspredinidae Bunocephalus coracoideus (Cope, 1874) Fr native   11.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Chilodontidae Caenotropus labyrinthicus (Kner, 1858) Fr native   14.80 cm SL male/unsexed ;25.30 cm SL female  Also Ref. 37477. 
Callichthyidae Callichthys callichthys (Linnaeus, 1758) Fr native   21.00 cm TL male/unsexed  Found in a temporary swamp (bajío) of seasonally flooded forest, connected to Arroyo Curiraba (Ref. 26654). 
Pimelodidae Calophysus macropterus (Lichtenstein, 1819) Fr native   40.00 cm TL male/unsexed   
Cyprinidae Carassius auratus (Linnaeus, 1758) Fr introduced   48.00 cm TL male/unsexed   
Serrasalmidae Catoprion mento (Cuvier, 1819) Fr, Fi native   15.00 cm SL male/unsexed   
Cetopsidae Cetopsis candiru Spix & Agassiz, 1829 Fr native   26.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36486). 
Cetopsidae Cetopsis coecutiens (Lichtenstein, 1819) Fr native   27.30 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36486). 
Cetopsidae Cetopsis pearsoni Vari, Ferraris & de Pinna, 2005 Fr native   11.40 cm SL male/unsexed    No picture yet.
Cetopsidae Cetopsis starnesi Vari, Ferraris & de Pinna, 2005 Fr native   9.70 cm SL male/unsexed  Known only from two localities in southeastern Bolivia, in the far northwestern portions of the río de La Plata basin and in the far southern reaches of the upper rio Madeira basin (Ref. 56045).  No picture yet.
Cichlidae Chaetobranchopsis australis Eigenmann & Ward, 1907 Fr questionable   12.00 cm SL male/unsexed  Probably found in the Amazon River basin (Ref. 36377). 
Chalceidae Chalceus guaporensis Zanata & Toledo-Piza, 2004 Fr native   17.40 cm SL male/unsexed  Known from Rio Guaporé (Ref. 55827). 
Crenuchidae Characidium bolivianum Pearson, 1924 Fr native   5.34 cm SL male/unsexed  Known from the upper Madeira River basin (Ref. 37059). Type locality: Río Popoi, Upper Río Beni system, Bolivia (Ref. 26282).  No picture yet.
Crenuchidae Characidium heinianum Zarske & Géry, 2001 Fr native   5.00 cm SL male/unsexed  Occurs in the upper Mamoré River basin (Ref. 37059). Type locality, Rio Ipurupuru, trib. of Rio Mamoré, near the cross of the river with the road to San Ramon, ca. 73 km north of Trinidad, 14°12'538"S, 64°56'268"W, Depto. Beni (Ref. 46206). 
Crenuchidae Characidium schindleri Zarske & Géry, 2001 Fr native   6.68 cm SL male/unsexed  Type locality, Left tributary of the Yungas River at Palmar (Ref. 46206).  No picture yet.
Pimelodidae Cheirocerus eques Eigenmann, 1917 Fr native    Known from the Amazon River basin (Ref. 36506). Type locality: Villa Bella, Río Beni into Río Madeira, Bolivia (Ref. 26282).  No picture yet.
Cichlidae Cichla pleiozona Kullander & Ferreira, 2006 Fr native   44.20 cm SL male/unsexed   
Cichlidae Cichlasoma bimaculatum (Linnaeus, 1758) Fr misidentification   12.30 cm SL male/unsexed ;30.00 cm TL female  Reported from this country (Ref. 1672, 7020). Occurrence of the species in the country is not confirmed (Ref. 36377). 
Cichlidae Cichlasoma boliviense Kullander, 1983 Fr native   10.70 cm SL male/unsexed  Known from Mamoré and Guaporé River basins (Ref. 36377). 
Cichlidae Cichlasoma dimerus (Heckel, 1840) Fr native   11.70 cm SL male/unsexed  Known from the Paraná River basin, in the Paraguay River drainage (Ref. 36377). 
Triportheidae Clupeacharax anchoveoides Pearson, 1924 Fr native   6.55 cm SL male/unsexed    No picture yet.
Serrasalmidae Colossoma macropomum (Cuvier, 1816) Fr native  Pacu (Spanish)  108 cm TL male/unsexed  Trinidad, Rio Mamore, MNHN 1989-1372 
Callichthyidae Corydoras aeneus (Gill, 1858) Fr native   7.50 cm SL male/unsexed   
Callichthyidae Corydoras albolineatus Knaack, 2004 Fr native   3.69 cm SL male/unsexed  Known from eastern Bolivia (Ref. 57767). 
Callichthyidae Corydoras bilineatus Knaack, 2002 Fr native   5.03 cm SL male/unsexed  Known from Madeira River basin in Santa Cruz and Beni Departments (Ref. 37395). 
Callichthyidae Corydoras cruziensis Knaack, 2002 Fr native   4.26 cm SL male/unsexed  Known from Madeira River basin in Santa Cruz and Beni Departments (Ref. 37395). 
Callichthyidae Corydoras geryi Nijssen & Isbrücker, 1983 Fr native   5.80 cm SL male/unsexed  Occurs near the city of Trinidad in Rio Mamore, Beni Province (Ref. 26041). 
Callichthyidae Corydoras haraldschultzi Knaack, 1962 Fr native   5.90 cm SL male/unsexed  Occurs in the upper Rio Guapore, a border river between Brazil and Bolivia (Ref. 26041). 
Callichthyidae Corydoras hastatus Eigenmann & Eigenmann, 1888 Fr native   2.40 cm SL male/unsexed   
Callichthyidae Corydoras isbrueckeri Knaack, 2004 Fr native   6.14 cm SL female  Known from río Itenez system, río Paragua in Departamento Santa Cruz, eastern Bolivia (Ref. 57767).  No picture yet.
Callichthyidae Corydoras latus Pearson, 1924 Fr native   5.20 cm SL male/unsexed  Known from the Beni River basin (Ref. 37395).  No picture yet.
Callichthyidae Corydoras mamore Knaack, 2002 Fr native      No picture yet.
Callichthyidae Corydoras negro Knaack, 2004 Fr native   5.06 cm SL male/unsexed  Known from río Blanco system, río Negro in Departamento Santa Cruz, eastern Bolivia (Ref. 57767). 
Callichthyidae Corydoras noelkempffi Knaack, 2004 Fr native   5.62 cm SL male/unsexed  Known from río Itenez system, río San Martin in Departamento Santa Cruz, eastern Bolivia (Ref. 57767).  No picture yet.
Callichthyidae Corydoras pantanalensis Knaack, 2001 Fr native   6.90 cm SL male/unsexed  Known from Cussis and Las Petas River basin (Ref. 37395). 
Callichthyidae Corydoras paragua Knaack, 2004 Fr native   3.50 cm SL male/unsexed  Known from río Itenez system, río Paragua in eastern Bolivia (Ref. 57767).  No picture yet.
Callichthyidae Corydoras paucerna Knaack, 2004 Fr native   3.61 cm SL male/unsexed  Known from río Itenez system, río Paragua in eastern Bolivia (Ref. 57767).  No picture yet.
Callichthyidae Corydoras sterbai Knaack, 1962 Fr native   6.80 cm SL male/unsexed  Known from the upper Rio Guapore (Ref. 26041). 
Characidae Creagrutus beni Eigenmann, 1911 Fr native   7.30 cm SL male/unsexed  Found in the upper Madeira River basin in northeastern Bolivia (Ref. 38376). 
Characidae Creagrutus pearsoni Mahnert & Géry, 1988 Fr native   3.40 cm SL male/unsexed  Known from the upper Madeira River basin (Ref. 38376). 
Cichlidae Crenicara latruncularium Kullander & Staeck, 1990 Fr native   8.90 cm SL male/unsexed  Known from the Amazon River basin, in the Guaporé and Mamoré drainages (Ref. 36377). 
Cichlidae Crenicara punctulata (Günther, 1863) Fr native   10.00 cm SL male/unsexed  Known from the upper Mamoré River (Ref. 36377). 
Cichlidae Crenicichla adspersa Heckel, 1840 Fr native   29.00 cm SL male/unsexed  Photo collected in Rio Pauserna, Santa Cruz Department (Heinz Arno Drawert, pers. comm. 10/18). 
Cichlidae Crenicichla johanna Heckel, 1840 Fr native   28.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Cichlidae Crenicichla lepidota Heckel, 1840 Fr native   20.90 cm TL male/unsexed  Known from the Amazon River basin in the Guaporé River drainage (Ref. 36377). 
Cichlidae Crenicichla semicincta Steindachner, 1892 Fr native   17.10 cm SL male/unsexed  Known from the Mamoré River basin (Ref. 36377). Type locality: Bolivia, Provinz Yuracares, im oberen Chaparé bei Puerto de San Mateo (Ref. 33021). 
Xenocyprididae Ctenopharyngodon idella (Valenciennes, 1844) Fr not established   150 cm TL male/unsexed   
Curimatidae Curimata roseni Vari, 1989 Fr native   19.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013). Also Ref. 34109.  No picture yet.
Curimatidae Curimata vittata (Kner, 1858) Fr native   19.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 12371). Also Ref. 34109. 
Curimatidae Curimatella alburnus (Müller & Troschel, 1844) Fr native   18.80 cm SL male/unsexed  Known from Rio Guaporé, Rio Mamoré, Rio Madre de Dios and Rio Blanco (Ref. 28798).  No picture yet.
Curimatidae Curimatella dorsalis (Eigenmann & Eigenmann, 1889) Fr native   14.90 cm TL male/unsexed  Known from the mouth of Rio Ibarre (Ref. 28798). 
Curimatidae Curimatella immaculata (Fernández-Yépez, 1948) Fr native   18.80 cm TL male/unsexed  Known from Rio Matos, Beni. Also Ref. 38013. 
Curimatidae Curimatella meyeri (Steindachner, 1882) Fr native   18.40 cm SL male/unsexed  Known from Beni in Puerto Almacen, Rio Blanco and mouth of Rio Ibarre and from Pando in Rio Madre de Dios basin , Laguna San Luis (Ref. 28798). Also Ref. 38013.  No picture yet.
Curimatidae Curimatopsis macrolepis (Steindachner, 1876) Fr native   6.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013). 
Cynodontidae Cynodon gibbus (Agassiz, 1829) Fr native   32.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38270). 
Curimatidae Cyphocharax notatus (Steindachner, 1908) Fr native   14.70 cm SL male/unsexed  Museum: Beni, Rio Itenez, 9 km SE of Costa Marques, Brazil, AMNH 37717. Arroyo Grande, 4 km W of Guayamerin, at Riberalta road, AMNH 37712 (Ref. 11334).  No picture yet.
Curimatidae Cyphocharax plumbeus (Eigenmann & Eigenmann, 1889) Fr native   17.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013). Museum: Beni, Rio Itenez (= Guaporé), at the confluence of Itenez and Machupo rivers, USNM 278559. Rio Blanco, USNM 278583 (Ref. 11334).  No picture yet.
Curimatidae Cyphocharax spiluropsis (Eigenmann & Eigenmann, 1889) Fr native   9.00 cm SL male/unsexed  Museum: Rio Beni, Cachuela Esperanza, CAS 63049, 63050 (as C. espeanzae). Rio Mamore, Laguna Santa Rosa, USNM 278565. Rio Itenez (= Guaporé), USNM 278560. Provincia Ballivia, USNM 305404 (Ref. 11334).  No picture yet.
Cyprinidae Cyprinus carpio Linnaeus, 1758 Fr, Aq introduced   120 cm TL male/unsexed   
Sternopygidae Distocyclus conirostris (Eigenmann & Allen, 1942) Fr native   50.00 cm TL male/unsexed  Found in the Amazon River (Ref. 39524).  No picture yet.
Pimelodidae Duopalatinus peruanus Eigenmann & Allen, 1942 Fr questionable   15.00 cm SL male/unsexed    No picture yet.
Sternopygidae Eigenmannia virescens (Valenciennes, 1836) Fr native   44.00 cm SL male/unsexed   
Auchenipteridae Entomocorus benjamini Eigenmann, 1917 Fr native   7.00 cm SL male/unsexed  Known from the Madeira River basin (Ref. 37098). Found in San Joaquin and Rio Santa Rita (Ref. 6868). Type locality, San Joaquin, FMNH 58109 (Ref. 57707). 
Auchenipteridae Epapterus dispilurus Cope, 1878 Fr native   15.40 cm SL male/unsexed    No picture yet.
Pimelodidae Exallodontus aguanai Lundberg, Mago-Leccia & Nass, 1991 Fr questionable   20.00 cm SL male/unsexed   
Loricariidae Farlowella altocorpus Retzer, 2006 Fr native   17.02 cm SL male/unsexed  Known from Coroico River of the Beni River basin in La Paz State (Ref. 58770). Also Ref. 58032.  No picture yet.
Loricariidae Farlowella nattereri Steindachner, 1910 Fr native   26.50 cm SL male/unsexed  Found in the Amazon River basin (Ref. 36389). 
Loricariidae Farlowella oxyrryncha (Kner, 1853) Fr native   23.00 cm SL male/unsexed  Found in the Amazon River (Ref. 36389).  No picture yet.
Poeciliidae Gambusia affinis (Baird & Girard, 1853) Fr introduced   5.10 cm TL male/unsexed ;7.00 cm TL female   
Cichlidae Geophagus megasema Heckel, 1840 Fr native   18.90 cm SL male/unsexed  Known from the Amazon River basin in the Guaporé River basin (Ref. 36377). 
Cichlidae Geophagus surinamensis (Bloch, 1791) Fr misidentification   14.80 cm SL male/unsexed  Recorded from the country (Ref. 6029). Occurrence in the country is not confirmed (Ref. 36377). 
Characidae Gephyrocharax chaparae Fowler, 1940 Fr native   4.75 cm SL male/unsexed  Known from the Chapare River basin (Ref. 38597). Type locality: Río Chapare, Río Madeira system, Cochabamba, Bolivia, elev. 1000 ft (Ref. 26282).  No picture yet.
Characidae Gephyrocharax major Myers, 1929 Fr native   5.64 cm SL male/unsexed  Known from the Beni River basin (Ref. 38597). Type locality: Río Popoi, Upper Río Beni, Rurrenabaque, Tumupasa, Ixiamas, Huachi, Amazon system, Bolivia (Ref. 33021).  No picture yet.
Characidae Gymnocorymbus flaviolimai Benine, Melo, Castro & Oliveira, 2015 Fr native   5.15 cm SL male/unsexed  Known from the Rio Madeira of the Amazon basin (Ref. 101636).  No picture yet.
Characidae Gymnocorymbus ternetzi (Boulenger, 1895) Fr native   7.50 cm SL male/unsexed   
Characidae Gymnocorymbus thayeri Eigenmann, 1908 Fr native   7.40 cm SL male/unsexed   
Rhamphichthyidae Gymnorhamphichthys hypostomus Ellis, 1912 Fr native   21.50 cm TL male/unsexed  Found in the upper Mamoré River basin (Ref. 36685).  No picture yet.
Gymnotidae Gymnotus carapo Linnaeus, 1758 Fr native   76.00 cm TL male/unsexed   
Gymnotidae Gymnotus mamiraua Albert & Crampton, 2001 Fr questionable   24.30 cm TL male/unsexed  Not in Ref. 36692.  No picture yet.
Gymnotidae Gymnotus pantanal Fernandes, Albert, Daniel-Silva, Lopes, Crampton & Almeida-Toledo, 2005 Fr native   26.00 cm TL male/unsexed  Known from Guaporé basin (Ref. 54472). 
Characidae Hemibrycon beni Pearson, 1924 Fr native   8.14 cm SL male/unsexed ;3.43 cm SL female  Type locality, Espia and río Colorado, lower Bopi. Known from río Beni drainage, upper río Madeira basin, where ríos La Paz and Miguilla join to form río Bopi, Espia, La Paa (Ref. 85819). Also Ref. 598.  No picture yet.
Characidae Hemibrycon jelskii (Steindachner, 1876) Fr native   7.79 cm SL male/unsexed ;10.17 cm SL female    No picture yet.
Doradidae Hemidoras boulengeri Steindachner, 1915 Fr native   19.30 cm SL male/unsexed  Known from the Amazon River (Ref. 37054).  No picture yet.
Doradidae Hemidoras stuebelii (Steindachner, 1882) Fr native   15.20 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Characidae Hemigrammus changae Ota, Lima & Hidalgo, 2019 Fr native   3.21 cm SL male/unsexed   
Characidae Hemigrammus lunatus Durbin, 1918 Fr native   4.80 cm TL male/unsexed  Known from the Amazon River (Ref. 96864).  No picture yet.
Characidae Hemigrammus neptunus Zarske & Géry, 2002 Fr native   3.20 cm SL male/unsexed  Found in the Amazon River basin (Ref. 38376). Type locality: Río Manuripi, close to confluence with Río Tahuamanu. MTD F 25536. 
Loricariidae Hemiodontichthys acipenserinus (Kner, 1853) Fr native   13.40 cm SL male/unsexed   
Pimelodidae Hemisorubim platyrhynchos (Valenciennes, 1840) Fr native   61.00 cm TL female   
Cichlidae Heros spurius Heckel, 1840 Fr native   15.00 cm SL male/unsexed  Known from the Guaporé River drainage, Amazon River basin (Ref. 36377). 
Erythrinidae Hoplerythrinus unitaeniatus (Spix & Agassiz, 1829) Fr native   28.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37025). Found in a temporary swamp (bajío) of seasonally flooded forest, connected to Arroyo Curiraba (Ref. 26654). 
Erythrinidae Hoplias malabaricus (Bloch, 1794) Fr native   65.00 cm TL male/unsexed   
Callichthyidae Hoplosternum littorale (Hancock, 1828) Fr native   26.30 cm TL male/unsexed  Recorded from Chiquitos (Ref. 26144). 
Cynodontidae Hydrolycus scomberoides (Cuvier, 1819) Fr native   117 cm TL male/unsexed  Known from the Amazon River basin (Ref. 38270). 
Characidae Hyphessobrycon megalopterus (Eigenmann, 1915) Fr native   3.64 cm SL male/unsexed  Recorded from Río Beni and Río Mamore. 
Characidae Hyphessobrycon pando Hein, 2009 Fr native   3.67 cm SL male/unsexed  Type locality, Departamento Pando, Rio Manuripi, near to Puerto Cardenas, ZFMK 41452 (holotype of Hyphessobrycon pando, 3.54 cm SL). Appaently limited to northern Bolivia (Ref. 82662). 
Xenocyprididae Hypophthalmichthys nobilis (Richardson, 1845) Fr not established   146 cm SL male/unsexed  Artificially reproduced in the hatchery of El Prado in the Department of Santa Cruz (Ref. 13686). 
Loricariidae Hypoptopoma baileyi Aquino & Schaefer, 2010 Fr native   4.40 cm TL male/unsexed  Type locality, Beni, backwater, Río Itenez, 10 km SE Costa Marques, Brazil, AMNH39828 (holotype of Hypoptopoma baileyi, 3.89 cm SL, female) (Ref. 84367).  No picture yet.
Loricariidae Hypoptopoma incognitum Aquino & Schaefer, 2010 Fr native   10.80 cm SL male/unsexed  Type locality, Beni, Río Itenez, opposite to Costa Marques, AMNH 39759 (holotype of Hypoptopoma incognitum, 8.501 cm SL, female). Known from Beni, Pando and Santa Cruz (Ref. 84367).  No picture yet.
Loricariidae Hypoptopoma inexspectatum (Holmberg, 1893) Fr native   7.10 cm SL male/unsexed  Known from Santa Cruz (Ref. 84367). 
Loricariidae Hypoptopoma thoracatum Günther, 1868 Fr native   11.50 cm TL male/unsexed  Found in the Amazon River (Ref. 36885). 
Hypopomidae Hypopygus neblinae Mago-Leccia, 1994 Fr native   12.20 cm TL male/unsexed    No picture yet.
Loricariidae Hypostomus bolivianus (Pearson, 1924) Fr native   15.00 cm TL male/unsexed  Type locality: Popoi River, Upper Beni, Bolivia (Ref. 26282, 6868).  No picture yet.
Loricariidae Hypostomus borellii (Boulenger, 1897) Fr native   16.10 cm SL male/unsexed  Type locality: Mission de San Francisco, Río Pilcomayo, Bolivia (Ref. 26282). 
Loricariidae Hypostomus fonchii Weber & Montoya-Burgos, 2002 Fr native   15.40 cm SL male/unsexed  Known from the río Chipiriri, Río Mamoré basin (Ref. 95502).  No picture yet.
Loricariidae Hypostomus levis (Pearson, 1924) Fr native   18.79 cm SL male/unsexed  Type locality: Huachi, Río Madeira system, Bolivia (Ref. 26282, 6868).  No picture yet.
Iguanodectidae Iguanodectes spilurus (Günther, 1864) Fr native   10.15 cm SL male/unsexed   
Heptapteridae Imparfinis cochabambae (Fowler, 1940) Fr endemic   6.00 cm SL male/unsexed  Known from Beni River basin (Ref. 36914). Type locality: Boca Chapare, Cochabamba, Bolivia (Ref. 26282). Also Ref. 6868.  No picture yet.
Heptapteridae Imparfinis guttatus (Pearson, 1924) Fr native   12.70 cm SL male/unsexed  Occurs in the Mamoré and Pilcomayo River basins (Ref. 36914). Type locality, Río Popoi, upper Río Beni (Ref. 6868, 26282).  No picture yet.
Heptapteridae Imparfinis stictonotus (Fowler, 1940) Fr native   4.80 cm SL male/unsexed  Type locality: Todos Santos, Río Chapare, Bolivia (Ref. 26282, 6868).  No picture yet.
Loricariidae Ixinandria steinbachi (Regan, 1906) Fr native   11.28 cm SL male/unsexed  Known from the upper río Bermejo and upper río Pilcomayo in southern Bolivia (Ref. 86762). Also Ref. 6868, 36389.  No picture yet.
Anablepidae Jenynsia alternimaculata (Fowler, 1940) Fr native   5.50 cm SL male/unsexed  Occurs in southern Bolivia, in a few streams that drain into the Amazon (Ref. 33161). Type locality, Monte Bello, Tarija (Ref. 26282).  No picture yet.
Engraulidae Jurengraulis juruensis (Boulenger, 1898) Fr native   17.90 cm SL male/unsexed   
Characidae Knodus longus Zarske & Géry, 2006 Fr native   4.61 cm SL male/unsexed  Known from río Warinilla (or Harinilla) near Choiro in Bolivia (Ref. 57791).  No picture yet.
Characidae Knodus mizquae (Fowler, 1943) Fr native    Type locality: Río Mizque, Ele Ele, Cochabamba, Bolivia, elev. 5000 ft.  No picture yet.
Characidae Knodus shinahota Ferreira & Carvajal, 2007 Fr native   3.69 cm SL male/unsexed  Type locality, río Shinahota, ca 150 m upriver from under bridge of new Cochabamba-Santa Cruz road, río Chapare basin (rio Mamoré system), town of Shinahota, Província de Tiraque, Cochabamba, LIRP 5722 (holotype of Knodus shinahota, 3.37 cm SL, male), (Ref. 75798).  No picture yet.
Characidae Knodus smithi (Fowler, 1913) Fr native   3.50 cm TL male/unsexed  Recorded from the Madeira River. Also Ref. 38376.  No picture yet.
Anostomidae Laemolyta fasciata Pearson, 1924 Fr native    Occurs in the Amazon River basin (Ref. 36801).  No picture yet.
Cichlidae Laetacara dorsigera (Heckel, 1840) Fr native   6.00 cm SL male/unsexed  Known from the Amazon River basin in the Guaporé River drainage (Ref. 36377). 
Loricariidae Lamontichthys filamentosus (La Monte, 1935) Fr native   16.70 cm SL male/unsexed  Known from the Amazon River (Ref. 36389). 
Pimelodidae Leiarius marmoratus (Gill, 1870) Fr native   100.00 cm TL male/unsexed   
Pimelodidae Leiarius pictus (Müller & Troschel, 1849) Fr questionable   60.00 cm TL male/unsexed   
Lepidosirenidae Lepidosiren paradoxa Fitzinger, 1837 Fr native   125 cm TL male/unsexed   
Anostomidae Leporinus bleheri Géry, 1999 Fr native   14.20 cm SL male/unsexed  Type locality: Rio Verde, trib. of the Iténez (Guaporé), Bolivia, at the border with Brazil, ca 30 km from mouth, ca 14°08'S, 60°30'W.  No picture yet.
Anostomidae Leporinus jamesi Garman, 1929 Fr native   15.49 cm SL male/unsexed    No picture yet.
Anostomidae Leporinus pearsoni Fowler, 1940 Fr native      No picture yet.
Anostomidae Leporinus striatus Kner, 1858 Fr native   25.00 cm TL male/unsexed   
Anostomidae Leporinus y-ophorus Eigenmann, 1922 Fr native     
Callichthyidae Lepthoplosternum beni Reis, 1997 Fr native   5.00 cm SL male/unsexed  Known from the Madeira River basin (Ref. 37395). Also Ref. 56211. 
Loricariidae Loricaria luciae Thomas, Rodriguez, Carvallaro, Froehlich & Macedo Corrêa e Castro, 2013 Fr native   18.91 cm SL male/unsexed  Known from the rio Paraguay basin (Ref. 94550). 
Characidae Makunaima guianensis (Eigenmann, 1909) Fr native   6.00 cm TL male/unsexed  Reported from El Beni, lagoons near Reyes, a pampa town 24 miles NE of Rurrenabaque (Ref. 100733). 
Characidae Markiana nigripinnis (Perugia, 1891) Fr native  Sardina (Spanish)  10.40 cm SL male/unsexed   
Callichthyidae Megalechis picta (Müller & Troschel, 1849) Fr native   17.00 cm SL male/unsexed   
Callichthyidae Megalechis thoracata (Valenciennes, 1840) Fr native   15.50 cm SL male/unsexed   
Anostomidae Megaleporinus reinhardti (Lütken, 1875) Fr questionable   17.00 cm SL male/unsexed  Known from the Rio Guaporé. Check occurrence in the reference.  No picture yet.
Trichomycteridae Megalocentor echthrus de Pinna & Britski, 1991 Fr native   8.79 cm SL male/unsexed  Known from the Rio Chapare (between its mouth and Todos Santos).  No picture yet.
Doradidae Megalodoras uranoscopus (Eigenmann & Eigenmann, 1888) Fr native   53.00 cm SL male/unsexed ;60.00 cm SL female 49 SL Also Ref. 37054. 
Pimelodidae Megalonema amaxanthum Lundberg & Dahdul, 2008 Fr native   24.10 cm SL male/unsexed ;31.20 cm SL female  Known from the Amazon River basin (Ref. 79495).  No picture yet.
Pimelodidae Megalonema platycephalum Eigenmann, 1912 Fr questionable   30.00 cm TL male/unsexed   
Rivulidae Melanorivulus punctatus (Boulenger, 1895) Fr native   3.50 cm TL male/unsexed   
Cichlidae Mesonauta festivus (Heckel, 1840) Fr native   12.10 cm SL male/unsexed  Known from the Amazon Rver basin in Guaporé and Mamoré River drainages (Ref. 36377). 
Serrasalmidae Metynnis guaporensis Eigenmann, 1915 Fr questionable  Pacupeba (Spanish)  16.00 cm SL male/unsexed    No picture yet.
Serrasalmidae Metynnis hypsauchen (Müller & Troschel, 1844) Fr native  Pacupeba (Spanish)  18.00 cm SL male/unsexed   
Serrasalmidae Metynnis maculatus (Kner, 1858) Fr questionable   18.00 cm TL male/unsexed  Reports are probably misidentifications of species of the M. lippincottianus group. 
Serrasalmidae Metynnis otuquensis Ahl, 1923 Fr native   8.70 cm SL male/unsexed  Known from the Paraguay River basin (Ref. 39031). 
Characidae Microgenys weyrauchi Fowler, 1945 Fr native   2.80 cm SL male/unsexed  Found in the Amazon River (Ref. 38376).  No picture yet.
Centrarchidae Micropterus salmoides (Lacepède, 1802) Fr introduced   97.00 cm TL male/unsexed   
Cichlidae Mikrogeophagus altispinosus (Haseman, 1911) Fr native   5.60 cm SL male/unsexed  Known from the Amazon River basin in the Guaporé and Mamoré River drainages (Ref. 36377). 
Rivulidae Moema beucheyi Valdesalici, Nielsen & Pillet, 2015 Fr native   8.17 cm SL male/unsexed ;7.34 cm SL female  Known from the Río San Miguel drainage, Río Madeira basin; also Río Machupo drainage, Río Madeira basin based on a photograph of a single specimen (Ref. 110333).  No picture yet.
Rivulidae Moema funkneri Valdesalici, 2019 Fr native   10.23 cm SL male/unsexed ;7.51 cm SL female  Type locality of Moema funkneri, Dept. Santa Cruz, Provincia Chiquitos, seasonal pool in the Río Grande drainage, Río Mamoré basin (Ref. 130493).  No picture yet.
Rivulidae Moema juanderibaensis Drawert, 2022 Fr native  Juan Deriba killifish (English)  4.61 cm SL male/unsexed  Type locality of the holotype of Moema juanderibaensis: Piraí watershed, upper Madeira drainage, Amazon basin, Santa Cruz (Ref. 128719).  No picture yet.
Rivulidae Moema pepotei Costa, 1993 Fr native   12.00 cm TL male/unsexed  Known from the Amazon River (Ref. 36579). 
Characidae Moenkhausia barbouri Eigenmann, 1908 Fr native   6.50 cm TL male/unsexed  Recorded from Rio Curibaba, Beni (Ref. 46237).  No picture yet.
Characidae Moenkhausia dorsinuda Zarske & Géry, 2002 Fr native   7.10 cm SL male/unsexed  Found in the Amazon River basin (Ref. 38376). Type locality: Río Ipurupuru about 75 kilometers north of Trinidad. MTD F24833. 
Characidae Moenkhausia intermedia Eigenmann, 1908 Fr native   8.00 cm SL male/unsexed  Paraguay river. 
Polycentridae Monocirrhus polyacanthus Heckel, 1840 Fr native   8.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 50082). 
Characidae Monotocheirodon pearsoni Eigenmann, 1924 Fr native   4.40 cm male/unsexed  Known from Rio Beni basin.  No picture yet.
Serrasalmidae Mylossoma albiscopum (Cope, 1872) Fr native   24.20 cm SL male/unsexed  Known from Rio Amazonas basin. Beni (Ref. 117280).  No picture yet.
Serrasalmidae Mylossoma aureum (Spix & Agassiz, 1829) Fr native  Pacupeba (Spanish)  20.00 cm TL male/unsexed  Known from the Amazon River (Ref. 39031). 
Serrasalmidae Mylossoma duriventre (Cuvier, 1818) Fr native  Pacupeba (Spanish)  25.00 cm SL male/unsexed   
Loricariidae Nannoptopoma sternoptychum Schaefer, 1996 Fr native   3.30 cm SL male/unsexed  Known from central Amazon River, including Rio Madeira basin (Ref. 84367). 
Lebiasinidae Nannostomus erythrurus (Eigenmann, 1909) Fr native   2.88 cm SL male/unsexed  Known from río Manuripi and Lago Largo (Ref. 94659).  No picture yet.
Lebiasinidae Nannostomus trifasciatus Steindachner, 1876 Fr native   3.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37104). 
Lebiasinidae Nannostomus unifasciatus Steindachner, 1876 Fr native   3.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37104). 
Doradidae Nemadoras humeralis (Kner, 1855) Fr native   16.30 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Rivulidae Neofundulus ornatipinnis Myers, 1935 Fr native   7.00 cm TL male/unsexed  Known from the Paraguay River (Ref. 36579).  No picture yet.
Rivulidae Neofundulus splendidus Nielsen & Brousseau, 2013 Fr native    Known only from the savannahs of the Llanos of Moxos in the Mamoré river drainage of the Amazonas river basin (Ref. 101435).  No picture yet.
Atherinopsidae Odontesthes bonariensis (Valenciennes, 1835) Fr, Aq introduced   50.00 cm TL male/unsexed   
Characidae Odontostilbe dierythrura Fowler, 1940 Fr native    Known from the Amazon drainage (Ref. 598, 37055). Type locality: Todos Santos, Río Chapare (Ref. 26282).  No picture yet.
Characidae Odontostilbe fugitiva Cope, 1870 Fr native   4.40 cm TL male/unsexed  Known from the Amazon River basin (Ref. 37055).  No picture yet.
Characidae Odontostilbe microcephala Eigenmann, 1907 Fr native   4.60 cm SL male/unsexed ;5.20 cm SL female  Known from the Pilcomayo River basin (Ref. 37055), and the Amazon basin (Ref. 128907). Type locality: Río Pilcomayo, La Plata system (Ref. 26282). Also Ref. 598.  No picture yet.
Characidae Odontostilbe nareuda Bührnheim & Malabarba, 2006 Fr native   3.79 cm SL male/unsexed  Known from the Madeira, Mamore, Orthon-lower Benin river basins (Ref. 57085).  No picture yet.
Characidae Oligosarcus bolivianus (Fowler, 1940) Fr native   14.70 cm SL male/unsexed  Known from the Lipeo River in the Paraguay River basin (Ref. 38376). 
Characidae Oligosarcus schindleri Menezes & Géry, 1983 Fr native   8.20 cm SL male/unsexed ;7.30 cm SL female  Museum: Cochabamba, Laguna Sarco, altitude ca. 1200-1500 m, MZUSP 27519; Laguna Alalay, MZUSP 25720 (Ref. 27925).  No picture yet.
Salmonidae Oncorhynchus mykiss (Walbaum, 1792) Fr, Aq introduced   122 cm TL male/unsexed   
Cichlidae Oreochromis mossambicus (Peters, 1852) Fr introduced   39.00 cm SL male/unsexed   
Cichlidae Oreochromis niloticus (Linnaeus, 1758) Fr, Aq introduced   60.00 cm SL male/unsexed   
Cyprinodontidae Orestias agassizii Valenciennes, 1846 Fr native   7.00 cm TL male/unsexed   
Cyprinodontidae Orestias albus Valenciennes, 1846 Fr native   18.00 cm TL male/unsexed  Known form the Lake Titicaca (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias cuvieri Valenciennes, 1846 Fr, Fi native  occasional (usually not seen) 27.00 cm TL male/unsexed  Known from Lake Titicaca (Ref. 50471). This species might be extinct (Ref. 4537, 27139). 
Cyprinodontidae Orestias forgeti Lauzanne, 1981 Fr native   12.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias frontosus Cope, 1876 Fr native  Carache (Spanish)  15.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias gilsoni Tchernavin, 1944 Fr endemic  Carache (Spanish)  4.50 cm TL male/unsexed  Known from the Lake Titicaca basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias gracilis Parenti, 1984 Fr native   5.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias imarpe Parenti, 1984 Fr native   7.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471).  No picture yet.
Cyprinodontidae Orestias incae Garman, 1895 Fr native   6.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471).  No picture yet.
Cyprinodontidae Orestias ispi Lauzanne, 1981 Fr native   9.00 cm TL male/unsexed  Known from Lake Titicaca (Ref. 50471). 
Cyprinodontidae Orestias luteus Valenciennes, 1846 Fr native   17.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias minimus Tchernavin, 1944 Fr native   3.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471).  No picture yet.
Cyprinodontidae Orestias olivaceus Garman, 1895 Fr native   7.50 cm TL male/unsexed  Known from the Lake Titicaca basin (Ref. 50471).  No picture yet.
Cyprinodontidae Orestias tchernavini Lauzanne, 1981 Fr native   6.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). 
Cyprinodontidae Orestias tomcooni Parenti, 1984 Fr native   6.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias tschudii Castelnau, 1855 Fr native   20.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias tutini Tchernavin, 1944 Fr native   4.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471).  No picture yet.
Doradidae Ossancora asterophysa Birindelli & Sabaj Pérez, 2011 Fr native   16.80 cm TL male/unsexed  Known from the Amazonas basin. Also recorded from the Río Mamoré drainage (Ref. 92411).  No picture yet.
Doradidae Ossancora eigenmanni (Boulenger, 1895) Fr native   15.20 cm SL male/unsexed   
Doradidae Ossancora fimbriata (Kner, 1855) Fr native   10.00 cm SL male/unsexed    No picture yet.
Doradidae Ossancora punctata (Kner, 1855) Fr native   11.30 cm SL male/unsexed   
Loricariidae Otocinclus mariae Fowler, 1940 Fr native   3.30 cm SL male/unsexed  Found in the upper Madeira and lower Amazon River basins (Ref. 36885). Type locality: Boca Chapare, Rio Chimore, Cochabamba, Bolivia (Ref. 6868). 
Loricariidae Otocinclus vestitus Cope, 1872 Fr native   3.20 cm SL male/unsexed   
Loricariidae Otocinclus vittatus Regan, 1904 Fr native   3.30 cm TL male/unsexed   
Doradidae Oxydoras kneri Bleeker, 1862 Fr native   70.00 cm TL male/unsexed  Found in Paraná River (Ref. 37054). 
Doradidae Oxydoras niger (Valenciennes, 1821) Fr native   100.00 cm SL male/unsexed 60 SL Also Ref. 37054 
Sciaenidae Pachyurus schomburgkii Günther, 1860 Fr native   28.50 cm SL male/unsexed ;28.90 cm SL female  Known from the Amazon River basin (Ref. 36888). 
Poeciliidae Pamphorichthys hasemani (Henn, 1916) Fr native   2.50 cm TL male/unsexed ;2.50 cm female  Known from the Rio Paraguay basin system in Puerto Suarez (Ref. 26130). No record from the west side of Paraguay River basin is available, although the type locality is Puerto Suárez (Ref. 50894).  No picture yet.
Rivulidae Papiliolebias ashleyae Nielsen & Brousseau, 2014 Fr native   3.60 cm SL male/unsexed ;2.90 cm SL female  Known only from a pool just beside the highway between the cities San José dos Chiquitos and San Ignácio de Velasco, Rio Mamoré basin, Rio Madeira drainage, departamento de Santa Cruz (Ref. 94790). 
Rivulidae Papiliolebias bitteri (Costa, 1989) Fr native   5.00 cm TL male/unsexed  Known from the Paraguay River (Ref. 36579). 
Rivulidae Papiliolebias francescae Valdesalici & Brousseau, 2014 Fr native   2.18 cm SL male/unsexed ;1.91 cm SL female  Found only in seasonal pools in the Rio San Pablo drainage, Rio Madeira basin, central-eastern Bolivia (Ref. 111235).  No picture yet.
Potamotrygonidae Paratrygon aiereba (Müller & Henle, 1841) Fr native  Raya (Spanish)  80.00 cm WD male/unsexed ;78.00 cm WD female  Occurs in the Amazon basin. 
Characidae Parecbasis cyclolepis Eigenmann, 1914 Fr native   8.00 cm SL male/unsexed    No picture yet.
Parodontidae Parodon buckleyi Boulenger, 1887 Fr native   15.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38267). 
Parodontidae Parodon carrikeri Fowler, 1940 Fr native   14.70 cm SL male/unsexed    No picture yet.
Loricariidae Peckoltia vittata (Steindachner, 1881) Fr native   15.00 cm TL male/unsexed  Known from the Río Madeira - Río Amazonas drainage (Ref. 77026). 
Pristigasteridae Pellona castelnaeana Valenciennes, 1847 Fr native   80.00 cm FL male/unsexed  Known from the Amazon River basin (Ref. 50591). 
Characidae Phenacogaster beni Eigenmann, 1911 Fr native   3.68 cm SL male/unsexed  Type locality, Rio Beni at Villa Bella (Ref. 36811).  No picture yet.
Heptapteridae Phenacorhamdia boliviana (Pearson, 1924) Fr endemic  Bagre (Spanish)  5.80 cm SL male/unsexed  Known from upper Mamoré/Madeira River basin (Ref. 36914). Type locality: Beni basin, Bolivia (Ref. 6868).  No picture yet.
Pimelodidae Phractocephalus hemioliopterus (Bloch & Schneider, 1801) Fr native   135 cm TL male/unsexed 81.5 SL  
Phreatobiidae Phreatobius sanguijuela Fernández, Saucedo, Carvajal-Vallejos & Schaefer, 2007 Fr, Thr native   4.21 cm SL male/unsexed  Found only in artificial wells of 6 m depth at Comunidad de Porvenir, near Río Paraguá, a tributary of the Río Iténez in eastern Santa Cruz, northeastern Bolivia (Ref. 59347). Under severe threat from overexploitation by local people, who routinely capture this fish when extracting drinking water from wells and kill this on the presumption that this represents a dangerous parasite (Ref. 59347).  No picture yet.
Iguanodectidae Piabucus caudomaculatus Vari, 1977 Fr native   9.60 cm SL male/unsexed  Known from the Mamoré River basin (Ref. 38383). Also Ref. 30248.  No picture yet.
Iguanodectidae Piabucus melanostoma Holmberg, 1891 Fr native   11.50 cm SL male/unsexed    No picture yet.
Serrasalmidae Piaractus brachypomus (Cuvier, 1818) Fr native  Tambaqui (Spanish)  88.00 cm TL male/unsexed 52 SL Known from the Amazon River basin (Ref. 39031). Recorded from the Mamore basin (Ref. 39139). 
Serrasalmidae Piaractus mesopotamicus (Holmberg, 1887) Fr native   40.50 cm SL male/unsexed   
Heptapteridae Pimelodella boliviana Eigenmann, 1917 Fr endemic   9.00 cm SL male/unsexed  Known from the Mamoré River basin (Ref. 36914). Type locality: Santa Cruz de la Sierra, Bolivia (Ref. 26282, 6868).  No picture yet.
Heptapteridae Pimelodella chaparae Fowler, 1940 Fr endemic  Bagre (Spanish)  5.10 cm SL male/unsexed  Known from the Beni River basin (Ref. 36914). Also Ref. 6868. Type locality: Boca Chapare, Cochabamba, Bolivia (Ref. 26282).  No picture yet.
Heptapteridae Pimelodella howesi Fowler, 1940 Fr native  Bagre (Spanish)  7.90 cm SL male/unsexed  Known from Beni River basin (Ref. 36914). Type locality: Boca Chapare, Río Chimore, Bolivia (Ref. 26282, 6868)  No picture yet.
Heptapteridae Pimelodella nigrofasciata (Perugia, 1897) Fr endemic  Bagre (Spanish)   Known from the Beni River basin (Ref. 36914). Type locality: Río Beni, Missioni Mosetenes, Amazon System, Bolivia (Ref. 26282). Also Ref. 6868.  No picture yet.
Heptapteridae Pimelodella roccae Eigenmann, 1917 Fr native   18.20 cm TL male/unsexed  Known from Beni River basin (Ref. 36914).  No picture yet.
Heptapteridae Pimelodella serrata Eigenmann, 1917 Fr native  Bagre (Spanish)  11.00 cm TL male/unsexed  Questionably found in Machupo River basin in the upper Guaporé River basin (Ref. 36914). Type locality: San Joaquín, Amazon system, Bolivia (Ref. 26282, 6868).  No picture yet.
Pimelodidae Pimelodina flavipinnis Steindachner, 1876 Fr questionable   39.00 cm SL male/unsexed   
Pimelodidae Pimelodus blochii Valenciennes, 1840 Fr native   35.00 cm TL male/unsexed   
Pimelodidae Pinirampus pirinampu (Spix & Agassiz, 1829) Fr native   120 cm TL male/unsexed 39.5 SL  
Sciaenidae Plagioscion squamosissimus (Heckel, 1840) Fr native   80.00 cm TL male/unsexed 21 SL Reported from Rio Mamoré, a tributary of the Amazon in Bolivia (Ref. 27188). 
Loricariidae Planiloricaria cryptodon (Isbrücker, 1971) Fr native   21.50 cm SL male/unsexed  Known from the Mamoré River basin (Ref. 36389). 
Doradidae Platydoras armatulus (Valenciennes, 1840) Fr native   43.00 cm SL male/unsexed  Known from the Paraná River (Ref. 37054). 
Doradidae Platydoras costatus (Linnaeus, 1758) Fr native   24.00 cm SL male/unsexed   
Doradidae Platydoras hancockii (Valenciennes, 1840) Fr native   15.00 cm TL male/unsexed   
Pimelodidae Platynematichthys notatus (Jardine, 1841) Fr questionable   80.00 cm SL male/unsexed   
Pimelodidae Platysilurus mucosus (Vaillant, 1880) Fr native   20.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36506). 
Trichomycteridae Plectrochilus machadoi Miranda Ribeiro, 1917 Fr native   9.30 cm male/unsexed  Known from the Amazon River basin (Ref. 39970). Type locality: Río Mamoré, Bolivia (Ref. 26282, 6868).  No picture yet.
Characidae Poptella compressa (Günther, 1864) Fr native   10.20 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36891). 
Trichomycteridae Potamoglanis hasemani (Eigenmann, 1914) Fr native   1.80 cm male/unsexed  Known from the Amazon River basin (Ref. 39970). Type locality: Santarem (Ref. 6868).  No picture yet.
Curimatidae Potamorhina altamazonica (Cope, 1878) Fr native   27.00 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). 
Curimatidae Potamorhina latior (Spix & Agassiz, 1829) Fr native   24.00 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). 
Belonidae Potamorrhaphis eigenmanni Miranda Ribeiro, 1915 Fr native   22.80 cm SL male/unsexed   
Potamotrygonidae Potamotrygon falkneri Castex & Maciel, 1963 Fr native  Raya de agua dulce (Spanish)  60.00 cm WD male/unsexed   
Potamotrygonidae Potamotrygon motoro (Müller & Henle, 1841) Fr native   50.00 cm WD male/unsexed   
Potamotrygonidae Potamotrygon orbignyi (Castelnau, 1855) Fr native   35.00 cm WD male/unsexed ;32.50 cm WD female   
Characidae Prionobrama filigera (Cope, 1870) Fr native   6.00 cm TL male/unsexed  Found in the Amazon River (Ref. 38376). 
Characidae Prionobrama paraguayensis (Eigenmann, 1914) Fr native   5.00 cm TL male/unsexed   
Prochilodontidae Prochilodus nigricans Spix & Agassiz, 1829 Fr native   48.50 cm SL male/unsexed ;52.50 cm SL female  Known from the Amazon River (Ref. 37057). 
Characidae Prodontocharax howesi (Fowler, 1940) Fr native   4.17 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37055). Type locality: Boca Chapare, Río Chimore, Cochabamba, Amazon system, Bolivia (Ref. 26282).  No picture yet.
Characidae Prodontocharax melanotus Pearson, 1924 Fr native   4.84 cm SL male/unsexed  Recorded from Rio Beni and Itenez.  No picture yet.
Characidae Protocheirodon pi (Vari, 1978) Fr native   3.10 cm SL male/unsexed  Type locality: Bolivia, Río Mamoré, 10 km west of San Pedro, lagoons communicating with river. 
Curimatidae Psectrogaster curviventris Eigenmann & Kennedy, 1903 Fr native  Sabalina (Spanish)  17.10 cm SL male/unsexed    No picture yet.
Curimatidae Psectrogaster essequibensis (Günther, 1864) Fr native   16.90 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). 
Curimatidae Psectrogaster rutiloides (Kner, 1858) Fr native   17.80 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). Type locality of Psectrogaster auratus (Ref. 33021). 
Aspredinidae Pseudobunocephalus amazonicus (Mees, 1989) Fr native   4.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Aspredinidae Pseudobunocephalus bifidus (Eigenmann, 1942) Fr native   4.30 cm SL male/unsexed  Occurs in Lake Rogoagua (Ref. 6868). Known from the Amazon River basin (Ref. 36695).  No picture yet.
Loricariidae Pseudohemiodon thorectes Isbrücker, 1975 Fr native   11.70 cm SL male/unsexed  Known from the Mamoré River basin (Ref. 36389).  No picture yet.
Pseudopimelodidae Pseudopimelodus mangurus (Valenciennes, 1835) Fr native   69.00 cm TL male/unsexed   
Pimelodidae Pseudoplatystoma fasciatum (Linnaeus, 1766) Fr native   105 cm SL male/unsexed 55 SL  
Pimelodidae Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 Fr native   60.50 cm SL male/unsexed   
Pimelodidae Pseudoplatystoma tigrinum (Valenciennes, 1840) Fr native   130 cm TL male/unsexed 81 SL Known from the Amazon River basin (Ref. 36506). 
Belonidae Pseudotylosurus angusticeps (Günther, 1866) Fr native   29.80 cm SL male/unsexed   
Aspredinidae Pterobunocephalus depressus (Haseman, 1911) Fr native   8.90 cm SL male/unsexed   
Doradidae Pterodoras granulosus (Valenciennes, 1821) Fr native   68.00 cm SL male/unsexed ;90.10 cm SL female 64 SL  
Rivulidae Pterolebias longipinnis Garman, 1895 Fr native   12.00 cm TL male/unsexed  Also Ref. 27139. 
Rivulidae Pterolebias phasianus Costa, 1988 Fr native   7.00 cm TL male/unsexed  Known from the Paraguay River (Ref. 36579). 
Loricariidae Pterygoplichthys ambrosettii (Holmberg, 1893) Fr native   54.90 cm TL male/unsexed ;55.00 cm TL female   
Loricariidae Pterygoplichthys disjunctivus (Weber, 1991) Fr native   70.00 cm TL male/unsexed   
Loricariidae Pterygoplichthys gibbiceps (Kner, 1854) Fr misidentification   50.00 cm TL male/unsexed  Known from the Rio Madeira drainage. Occurrence in this country not confirmed by C. Weber; probably a misidentification. 
Loricariidae Pterygoplichthys lituratus (Kner, 1854) Fr native   37.00 cm SL male/unsexed    No picture yet.
Loricariidae Pterygoplichthys punctatus (Kner, 1854) Fr native   28.50 cm SL male/unsexed  Collected from south of Todos Santos, in pool of standing water (Ref. 75871). 
Serrasalmidae Pygocentrus nattereri Kner, 1858 Fr native  Palometa (Spanish)  50.00 cm SL male/unsexed 18 SL Also Ref. 1672, 39031. 
Lebiasinidae Pyrrhulina australis Eigenmann & Kennedy, 1903 Fr native   5.00 cm SL male/unsexed   
Lebiasinidae Pyrrhulina beni Pearson, 1924 Fr native   5.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37104).  No picture yet.
Lebiasinidae Pyrrhulina vittata Regan, 1912 Fr native   3.50 cm SL male/unsexed   
Sternopygidae Rhabdolichops caviceps (Fernández-Yépez, 1968) Fr native   31.00 cm TL male/unsexed    No picture yet.
Sternopygidae Rhabdolichops eastwardi Lundberg & Mago-Leccia, 1986 Fr native   27.60 cm TL male/unsexed    No picture yet.
Loricariidae Rhadinoloricaria bahuaja (Chang & Castro, 1999) Fr native   16.40 cm SL male/unsexed  Known from Rio Grande (tributary of Rio Mamoré) in Boeto province (Ref. 32973) and Rio Manuripe in Pando (Ref. 36389).  No picture yet.
Heptapteridae Rhamdella rusbyi Pearson, 1924 Fr endemic   18.40 cm male/unsexed  Known from Beni River basin (Ref. 36914). Type locality: Río Colorado, Lower Bopi, Amazon system, Bolivia (Ref. 26282, 6868).  No picture yet.
Heptapteridae Rhamdia poeyi Eigenmann & Eigenmann, 1888 Fr native   19.70 cm SL male/unsexed   
Heptapteridae Rhamdia quelen (Quoy & Gaimard, 1824) Fr native   61.00 cm TL male/unsexed   
Doradidae Rhinodoras dorbignyi (Kner, 1855) Fr native   50.00 cm TL male/unsexed  Known from the Paraná River (Ref. 37054). 
Pseudopimelodidae Rhyacoglanis epiblepsis Shibatta & Vari, 2017 Fr native   5.42 cm SL male/unsexed  Type locality of Rhyacoglanis epiblepsis: Beni, Río Itenez, cachuelo approximately 300 m above mouth of río Machupo. Known only from the Rio Madeira-Mamore system (Ref. 128485).  No picture yet.
Anostomidae Rhytiodus lauzannei Géry, 1987 Fr native    Known from Tijamuchi and Mamoré River basins (Ref. 36801). Type locality, flood zone of Rio Tijamuchi near Trinidad, River Mamoré (Ref. 33021).  No picture yet.
Loricariidae Rineloricaria beni (Pearson, 1924) Fr native   7.80 cm SL male/unsexed  Known from the Beni River basin (Ref. 36389).  No picture yet.
Characidae Roeboides dispar Lucena, 2001 Fr native   8.11 cm SL male/unsexed    No picture yet.
Bryconidae Salminus brasiliensis (Cuvier, 1816) Fr native   100.00 cm SL male/unsexed   
Salmonidae Salmo trutta Linnaeus, 1758 Fr introduced   140 cm SL male/unsexed   
Salmonidae Salvelinus fontinalis (Mitchill, 1814) Fr introduced   86.00 cm SL male/unsexed   
Salmonidae Salvelinus namaycush (Walbaum, 1792) Fr not established   150 cm TL male/unsexed  Reintroduced in 1944. Attempted to acclimatize in Lake Titicaca, however, species failed. 
Cichlidae Satanoperca jurupari (Heckel, 1840) Fr native   26.00 cm SL male/unsexed ;23.30 cm SL female  Known from the Amazon drainage except the Guaporé River. (Ref. 36377). 
Cichlidae Satanoperca pappaterra (Heckel, 1840) Fr native   27.00 cm TL male/unsexed ;27.50 cm TL female  Known from Guaporé River, Amazon River basin (Ref. 36377). 
Anostomidae Schizodon fasciatus Spix & Agassiz, 1829 Fr native   40.00 cm TL male/unsexed  Known from Arroyo Aguas Negras (Ref. 26654). Also Ref. 36801. 
Anostomidae Schizodon isognathus Kner, 1858 Fr native   35.00 cm SL male/unsexed  Known from the Río Paraguay system (Ref. 75767).  No picture yet.
Scoloplacidae Scoloplax dicra Bailey & Baskin, 1976 Fr native   1.38 cm SL male/unsexed    No picture yet.
Scoloplacidae Scoloplax empousa Schaefer, Weitzman & Britski, 1989 Fr native   1.99 cm SL male/unsexed   
Characidae Serrapinnus micropterus (Eigenmann, 1907) Fr native   2.63 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37055). Type locality: San Joaquín, Bolivia (Ref. 26282).  No picture yet.
Serrasalmidae Serrasalmus compressus Jégu, Leão & Santos, 1991 Fr native  Piraña (Spanish)  19.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031). Recorded from Rio Madeira (Ref. 26758). Also Ref. 85594. 
Serrasalmidae Serrasalmus elongatus Kner, 1858 Fr native  Piraña (Spanish)  30.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Serrasalmidae Serrasalmus hollandi Eigenmann, 1915 Fr native  Piraña (Spanish)  18.50 cm SL male/unsexed  Known from the Madeira River basin (Ref. 39031). Also Ref. 85594. 
Serrasalmidae Serrasalmus humeralis Valenciennes, 1850 Fr native   20.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Serrasalmidae Serrasalmus maculatus Kner, 1858 Fr native   26.40 cm TL male/unsexed ;34.50 cm TL female   
Serrasalmidae Serrasalmus odyssei Hubert & Renno, 2010 Fr native   16.72 cm SL male/unsexed  Type locality, Madeira, Rio Itenez, Bella vista, MNHN 2005-2216 (holotype of Serrasalmus odyssei, 16.72 cm SL). Known only from Rio San Martin and Rio Paraguá (Itenez watershed, Rio Manuripi from the Béni watershed and Rio Yata; abundant in the Itenez watershed and rare elsewhere (Ref. 85594).  No picture yet.
Serrasalmidae Serrasalmus rhombeus (Linnaeus, 1766) Fr native   41.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031). Also Ref. 85594. 
Pimelodidae Sorubim elongatus Littmann, Burr, Schmidt & Isern, 2001 Fr native   32.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36506). 
Pimelodidae Sorubim lima (Bloch & Schneider, 1801) Fr native   54.20 cm TL male/unsexed   
Pimelodidae Sorubim maniradii Littmann, Burr & Buitrago-Suarez, 2001 Fr native   25.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36506).  No picture yet.
Pimelodidae Sorubimichthys planiceps (Spix & Agassiz, 1829) Fr native   150 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36506). 
Loricariidae Spatuloricaria evansii (Boulenger, 1892) Fr native   28.20 cm SL male/unsexed  Known from the Beni River basin (Ref. 36389). 
Rivulidae Spectrolebias brousseaui Nielsen, 2013 Fr native   3.20 cm SL male/unsexed ;3.46 cm SL female  Type locality. 
Rivulidae Spectrolebias filamentosus (Costa, Barrera & Sarmiento, 1997) Fr endemic   5.00 cm TL male/unsexed  Known from the Mamoré River basin (Ref. 36579). 
Rivulidae Spectrolebias pilleti Nielsen & Brousseau, 2013 Fr native   3.00 cm SL male/unsexed ;2.43 cm SL female  Known only from the type locality, a pool near of the río Quimone, tributary of the río San Pablo, tributary of the río Mamoré, Departamento Santa Cruz, Quimone city (Ref. 95105).  No picture yet.
Hypopomidae Steatogenys elegans (Steindachner, 1880) Fr native   29.40 cm TL male/unsexed  Found in the Amazon River (Ref. 37053).  No picture yet.
Curimatidae Steindachnerina bimaculata (Steindachner, 1876) Fr native   17.30 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). 
Curimatidae Steindachnerina binotata (Pearson, 1924) Fr native   13.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013).  No picture yet.
Curimatidae Steindachnerina dobula (Günther, 1868) Fr native   16.30 cm SL male/unsexed  Known from the Amazon basin (Ref. 30554). Also Ref. 38013. 
Curimatidae Steindachnerina guentheri (Eigenmann & Eigenmann, 1889) Fr native   11.10 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). Also Ref. 28798. 
Curimatidae Steindachnerina hypostoma (Boulenger, 1887) Fr native   9.80 cm SL male/unsexed  Known from the Amazon River (Ref. 38013).  No picture yet.
Curimatidae Steindachnerina leucisca (Günther, 1868) Fr native   15.10 cm SL male/unsexed  Known from the Amazon River (Ref. 38013).  No picture yet.
Curimatidae Steindachnerina planiventris Vari & Williams Vari, 1989 Fr native   8.70 cm SL male/unsexed  Known from the Amazon River basins (Ref. 38013).  No picture yet.
Trichomycteridae Stenolicmus sarmientoi de Pinna & Starnes, 1990 Fr native   29.50 cm NG male/unsexed  Known from the upper Apere River basin (Ref. 39970). Type locality: Río Matos, trib. of Río Apere, 48 km east of San Borja, Ballivia Prov., Depto. Beni, Bolivia, 14°55'S, 66°17'W.  No picture yet.
Sternopygidae Sternopygus macrurus (Bloch & Schneider, 1801) Fr native   141 cm TL male/unsexed   
Characidae Stethaprion crenatum Eigenmann, 1916 Fr native   8.50 cm SL male/unsexed  Type locality: San Joaquín, Bolivia.  No picture yet.
Synbranchidae Synbranchus madeirae Rosen & Rumney, 1972 Fr native   100.00 cm TL male/unsexed  Known from the Madeira River basin (Ref. 79717).  No picture yet.
Synbranchidae Synbranchus marmoratus Bloch, 1795 Fr native   150 cm TL male/unsexed   
Auchenipteridae Tatia aulopygia (Kner, 1858) Fr native   15.90 cm SL male/unsexed  Known from the Amazon basin (Ref. 79512). 
Gasteropelecidae Thoracocharax stellatus (Kner, 1858) Fr native   6.70 cm SL male/unsexed   
Doradidae Trachydoras microstomus (Eigenmann, 1912) Fr native   5.90 cm SL male/unsexed    No picture yet.
Doradidae Trachydoras paraguayensis (Eigenmann & Ward, 1907) Fr native   19.20 cm SL male/unsexed  Known from the Paraná River (Ref. 37054).  No picture yet.
Doradidae Trachydoras steindachneri (Perugia, 1897) Fr native   16.00 cm SL male/unsexed  Found in the Rio Beni (ref. 6868). Known from the Amazon River (Ref. 37054). 
Trichomycteridae Trichomycterus aguarague Fernández & Osinaga, 2006 Fr native    Known from the Aguarague National Park (Ref. 57840).  No picture yet.
Trichomycteridae Trichomycterus atochae (Allen, 1942) Fr native    Known from Río de Atocha (Ref. 86697).  No picture yet.
Trichomycteridae Trichomycterus barbouri (Eigenmann, 1911) Fr native   3.70 cm male/unsexed  Known from the Beni River basin (Ref. 39970). Also Ref. 6868.  No picture yet.
Trichomycteridae Trichomycterus borellii Boulenger, 1897 Fr native   11.00 cm male/unsexed  Found in Aguairenda (Ref. 39970).  No picture yet.
Trichomycteridae Trichomycterus chaberti Durand, 1968 Fr endemic   11.45 cm male/unsexed 4 SL Type locality: (Grotte de) Umayalanta, Bolivia. Only present in the Torotoro National Park (Ref. 57918). Also Ref. 39970. 
Trichomycteridae Trichomycterus duellmani Arratia & Menu-Marque, 1984 Fr native   4.80 cm TL male/unsexed  Known from the Tupiza River basin (Ref. 39970). Type locality: Río Tupiza, 12.5 km southeast of Tupiza, Bolivia, 22°33'S, 65°45'W.  No picture yet.
Trichomycteridae Trichomycterus fassli (Steindachner, 1915) Fr native   14.90 cm male/unsexed  Known from the Songo River basin (Ref. 39970). Type locality: Rio Songo, north of Yungas, Bolivia (Ref. 6868).  No picture yet.
Trichomycteridae Trichomycterus rivulatus Valenciennes, 1846 Fr native   37.40 cm TL male/unsexed   
Trichomycteridae Trichomycterus therma Fernández & Miranda, 2007 Fr native   5.84 cm SL male/unsexed  Known only from the type locality within the limits of the man-made thermal bath of Miraflores, in the northern part of Potosí. Type locality, near Baños Termales Miraflores, Río Tarapaya drainage, Pilcomayo-Paraná basin, Departamento Potosí (Ref. 72406).  No picture yet.
Trichomycteridae Trichomycterus tiraquae (Fowler, 1940) Fr native   6.01 cm SL male/unsexed  Found in the thermal stream in Miraflores, Potosí. The stream is currently facing increasing exploitation through tourism (Ref. 72406).  No picture yet.
Trichomycteridae Tridentopsis pearsoni Myers, 1925 Fr native   2.30 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 39970). Type locality: Lagoons at Rogoagua, Bolivia (Ref. 26282, 6868).  No picture yet.
Rivulidae Trigonectes macrophthalmus Costa, 1990 Fr questionable   8.00 cm TL male/unsexed  Not in Ref. 36579; occurrence needs verification.  No picture yet.
Rivulidae Trigonectes rogoaguae (Pearson & Myers, 1924) Fr endemic   10.00 cm TL male/unsexed  Known from the Mamoré River basin (Ref. 36579). 
Triportheidae Triportheus albus Cope, 1872 Fr native   25.70 cm TL male/unsexed  Found in the Amazon River (Ref. 38376). 
Triportheidae Triportheus angulatus (Spix & Agassiz, 1829) Fr native   23.80 cm SL male/unsexed   
Auchenipteridae Tympanopleura atronasus (Eigenmann & Eigenmann, 1888) Fr native   14.90 cm SL male/unsexed   
Auchenipteridae Tympanopleura brevis (Steindachner, 1881) Fr native   16.00 cm SL male/unsexed  Known from the Amazon River (Ref. 37098).  No picture yet.
Auchenipteridae Tympanopleura rondoni (Miranda Ribeiro, 1914) Fr native   17.40 cm SL male/unsexed  Known from río Mamoré and río Guaporé (Ref. 103256).  No picture yet.
Characidae Tyttobrycon dorsimaculatus Géry, 1973 Fr native   1.95 cm SL male/unsexed  Type locality: Río Chaparé, trib. of Río Mamoré, below Todos Santos, Central Bolivia, ca. 16°45'S, 65°07'W (Ref. 26282).  No picture yet.
Characidae Tyttobrycon spinosus Géry, 1973 Fr native   2.05 cm SL male/unsexed  Type locality: Between upper Río Chaparé and Río Chimoré, trib. of Río Mamoré, east of Todos Santos, cent. Bolivia (Ref. 26282).  No picture yet.
Trichomycteridae Vandellia cirrhosa Valenciennes, 1846 Fr native   17.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39970). Type locality: Río Beni, Mission Mosetenes, upper Amazon, Bolivia (Ref. 26282, 6868). 
Characidae Xenurobrycon polyancistrus Weitzman, 1987 Fr native   1.44 cm SL male/unsexed  Known from Rio Mamore basin.  No picture yet.
Pimelodidae Zungaro jahu (Ihering, 1898) Fr native   140 cm SL male/unsexed  Known from the Paraná. 
Pimelodidae Zungaro zungaro (Humboldt, 1821) Fr native   140 cm SL male/unsexed   
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