zoanthid

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zoanthid

any member of the order Zoanthidea, a group of about 300 species of marine animals of the class Anthozoa (phylum Cnidaria) characterized by a polyp (i.e., a cylindrical stalklike structure with a mouth and tentacles at the upper end and attached to a surface at the lower end). The zoanthid closely resembles the sea anemone, differing from it chiefly in being generally smaller and in having a mucous coat to which sand and other materials adhere.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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