Anthozoa is a class within the phylum Cnidaria that contains the sea anemones and corals. More than 6,100 species have been described.
The name comes from the Greek words άνθος [anthos] (meaning flower) and ζώα [zoa] (meaning animals), hence anthozoa = “flower animals”, a reference to the floral appearance of their perennial polyp stage.
Like those of other cnidarians, the individual polyps have a cylindrical body crowned by a ring of tentacles surrounding the mouth.
All cnidarian species can feed by catching prey with stinging nematocysts; sea anemones are capable of catching fish and gorgonian corals of catching plankton.