1) Invertebrate 2) Moss animal 3) Polyzoan 4) Sea mat 5) Sea moss 1) Polyzoan 2) Sea mat 
• (n.) One of the Bryozoa. • (a.) Of or pertaining to the Bryozoa.
Bryozoans meaning moss life) are a phylum of small invertebrate animals that live in salt water (or occasionally in fresh or brackish water) and are also called moss animals or sea mats. Bryozoans live in colonies of many polyps. They have ciliated tentacles and a hard, box-like, calcium carbonate skeleton. Bryozoans date from the Early Ordovician ...
Bry`o·zo'an adjective (Zoology) Of or pertaining to the Bryozoa. -- noun One of the Bryozoa. 
[n] - sessile aquatic animal forming mosslike colonies of small polyps each having a curved or circular ridge bearing tentacles
bryozoan Animals that attach themselves to hard substrates or algae in marine, brackish, and freshwater.
polyzoan noun sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding
belonging or pertaining to the Bryozoa.