Echinoderms. By Hillary Goins Zoology 8 th Period. Basic Info on Echinoderms. Approximately 6,000 species Found in all oceans of the world Move by suction cup appendages and have skin covered with tiny, jaw-like pincers; their tube feet allow them to break open the shells of bivalves
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By Hillary Goins
Approximately 950 species of Echinoids