Anthozoa
Anthozoans, which include true corals, anemones, and sea pens, have a cylinder-like body topped with a ring of tentacles surrounding the mouth. The mouth leads into a tubular pharynx which decreases for some distance into the body before opening into the gastrovascular cavity. Unlike some cnidarians, however, the cavity is subdivided by a number of radiating partitions, or separations. The gonads are also located within the cavity walls.