Tentacle
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In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anato
Front view of land snail showing upper and lower sets of tentacles
Abalone showing pallial tentacles
Deep-sea ctenophore trailing tentacles studded with tentilla
Polyp (zoology)
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A polyp in zoology is one of two forms found in the phylum Cnidaria, the other being the medusa. Polyps are roughly cylindrical in shape and elongated at the axis of the vase-shaped body. In solitary
Gorgonian polyps in a reef aquarium
Anatomy of a coral polyp
Polyps of a colony of Cnidaria