giant green anemone or ( anthopleura sp.) in a marine aquarium

actiniaria anemone anemones animalia anthopleura anthozoa aquatic cnidaria coastal dinoflagellates fauna giant green hexacorallia invertebrate invertebrates marine moonglow mouth nature ocean piscivora polyp pool predator sea sealife singlecelled tentacle tidal tropical underwater wildlife xanthogrammica zoochlorellae zooxanthellae