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Not bladderwrack or seaweed, but a "Mermaid's purse" or "Devil's purse" :o)
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The thornback ray or thornback skate, ''Raja clavata'', is a species of ray fish in the Rajidae family.
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This is not Bladderwrack or some other seaweed, but much more interesting: It's the egg case of a Skate (a Ray) !
If you geotag the image or tell us where you found this and how big it was, someone might even have an idea about the species ...
I don't know where you're from, or what languages you command, but here is some info and keys:
- https://en.wikipedia.org/wiki/Egg_case_%28Chondrichthyes%29
- http://staffweb.itsligo.ie/staff/dcotton/Mermaids_purses.html
- https://www.sharktrust.org/shared/great_eggcase_hunt/eggcase_id_key.pdf
And some (Dutch) keys and info for the species from our beaches:
- http://www.dutchsharksociety.org/wp/wp-content/uploads/2017/04/GroteEikapseljacht_2017.jpg
- http://www.dutchsharksociety.org/wp/wp-content/uploads/2014/06/DeGroteEikapselJacht.pdf
- http://www.anemoon.org/DesktopModules/Bring2mind/DMX/Download.aspx?command=core_download&entryid=556&language=nl-NL&PortalId=0&TabId=165
- http://www.anemoon.org/flora-en-fauna/soorteninformatie/soorten/id/607/eikapsels-roggen-en-haaien Posted 6 years ago, modified 6 years ago
Posted 6 years ago