The Polychaeta or polychaetes are a polyphyletic class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. Indeed, polychaetes are sometimes referred to as bristle worms. More than 10,000 species are described in this class. Commo... Found on http://en.wikipedia.org/wiki/Polychaete
any worm of the class Polychaeta (phylum Annelida). About 5,400 living species are known. Polychaetes, which include rag worms, lugworms, ... [14 related articles] Found on http://www.britannica.com/eb/a-z/p/89