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Thornback Ray - Raja clavata Not bladderwrack or seaweed, but a "Mermaid's purse" or "Devil's purse" :o) Batoidea,Chondrichthyes,Chordata,Egg,Elasmobranchii,Geotagged,Raja clavata,Rajidae,Rajiformes,Rays,Skates,Thornback ray,United Kingdom,Winter Click/tap to enlarge Species introCountry intro

    comments (3)

  1. Hi Marjorie,
    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 one year ago, modified one year ago
    1. thank you
      Posted one year ago
      1. In the UK I would tentatively think it to be Raja clavata ... I'll ID it under that name for now :o) Posted one year ago, modified one year ago

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The thornback ray or thornback skate, ''Raja clavata'', is a species of ray fish in the Rajidae family.

Similar species: Skates
Species identified by Pudding4brains
View marjorie1's profile

By marjorie1

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Uploaded Jul 6, 2017. Captured Jan 9, 2017 06:21 in Unnamed Road, Llandovery SA20, UK.
  • FinePix S9400W S9450W
  • f/5.6
  • 1/23s
  • ISO400
  • 28.3mm