Anthozoa | class of cnidarians | Britannica

(hydrozoans); Scyphozoa (scyphozoans); Anthozoa (anthozoans); and Cubozoa (cubozoans). All cnidarians share several attributes, supporting the theory that they had a single origin. Variety and symmetry of body forms, varied coloration, and the sometimes complex life histories of cnidarians fascinate layperson and scientist alike. Inhabiting all marine and some…

Class Anthozoa Exclusively polypoid with biradial symmetry. Oral end a disk with central mouth and hollow tentacles arising at margin and/or on surface. Mouth leads to coelenteron via stomodaeum that has ciliated troughs (siphonoglyphs) for water transport into and out of coelenteron. Coelenteron divided by radial…