sea anemone

noun

1. any sedentary marine animal of the phylum Coelenterata, having a columnar body and one or more circles of tentacles surrounding the mouth.

noun

1. any of various anthozoan coelenterates, esp of the order Actiniaria, having a polypoid body with oral rings of tentaclesSee also actinia

1. Any of numerous, often brightly colored cnidarians of the class Anthozoa, having flexible cylindrical bodies with tentacles surrounding a central mouth. Sea anemones are related to jellyfish and corals, but have no free-swimming (medusoid) stage, and resemble flowers.