RM2G7GTXY–striped ruffe, schraetzer, Danube ruffe (Gymnocephalus schraetzer, Gymnocephalus schraetser), two females ready for spawning with a male, Germany
RM2C8FF41–striped ruffe, schraetzer, Danube ruffe (Gymnocephalus schraetzer, Gymnocephalus schraetser), rays of the dorsal fin, detail, Germany
RM2C69K4W–striped ruffe, schraetzer, Danube ruffe (Gymnocephalus schraetzer, Gymnocephalus schraetser), rays of the dorsal fin, detail, Germany
RM2C69M3J–striped ruffe, schraetzer, Danube ruffe (Gymnocephalus schraetzer, Gymnocephalus schraetser), male and female with nuptial colouration at spawning place