- bryozoan, polyzoan, sea mat, sea moss, moss animal - sessile aquatic animal forming mosslike colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding
--1 is a kind of invertebrate
--1 is a member of Bryozoa, phylum Bryozoa, polyzoa - sea moss - any of various red algae having graceful rose to purple fronds (e.g. dulse or carrageen)
--2 is a kind of red algae