Definitions for "Sea anemone"
Any one of numerous species of soft-bodied Anthozoa, belonging to the order Actinaria; an actinian.
marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton
a cnidarian that lives attached to the sea floor, coral or rock, and looks like a flower with a mouth that is surrounded by tentacles that reach upward
Keywords:  extremely, simple, animal
an extremely simple animal