Class Anthozoa - Sea Anemones and Corals
Organisms in the class anthozoa belong to the phylum Cnidaria. Anthozoans are marine and only exist in the polyp stage (no medusa stage). Organisms can be solitary (sea anemones) or live in colonies (corals). Sea anemones have an oral disk (surrounds the mouth at the top), a column (the “stalk” of the sea anemone), and a pedal disk with acontia (helps with anchoring to a substrait) on the bottom. Corals are colonial anthozoans. They can be stony or soft.