Polyp
a name usually applied to an animal like the fresh-water hydra or like the sea anemone, having a tubular body and a wreath of many tentacles around the mouth. The name is equally applicable to an isolated individual or to a member (zooid or "person") of a colony.
Thus, the individuals which make up a zoöphyte or a coral colony are called polyps, and the term is seldom used except in reference to cœlentrate animals .