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  • Sea urchin - Wikipedia, the free encyclopedia

    Sea urchins or urchins are small, spiny, globular animals that compose part of class Echinoidea. They are found in all oceans. Their shell, or "test", ...

    en.wikipedia.org/wiki/Sea_urchin - Similar

  • The Echinoidea

    More sea urchin information and pictures may be had at Animal Diversity Web: Echinoidea. The Sea Urchin Harvesters Association site and the TED Sea Urchin ...

    www.ucmp.berkeley.edu/echinodermata/echinoidea.html - Similar

  • ADW: Echinoidea: Information

    Class: Echinoidea. Members of this Class. There are approximately 940 species of echinoids distributed worldwide in marine habitats from the intertidal to ...

    animaldiversity.ummz.umich.edu/site/accounts/informat... - Similar

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