Well they aren't either... They are corallimorphs (and the official description of corallimorphs is "coral anemones" -- confusing huh?) and are in the same phylum as anemones and corals.
oh i understand that. i was just scared because some are refered to as mushroom anemones so i wanted to make sure that i didnt get an anemone. i dont want to kill my tank thats all