Bryozoans are aquatic invertebrates that are also known as moss animals or sea mats. These small creatures form colonies and attach themselves to substrates such as rocks, shells, and seaweed. Bryozoans are filter feeders, using tentacle-like structures called lophophores to capture small particles of food from the water. Synonyms for bryozoans include phylactolaemates, ectoprocts, and polyzoans. Phylactolaemates are freshwater bryozoans, while ectoprocts and polyzoans refer to all bryozoans, regardless of habitat. Other common names for bryozoans include sea lace, lace coral, and jelly moss. Despite their common names, bryozoans are neither plants nor corals, but are instead classified as animals.