Identify and Classify Polychaeta of East coast of Bahrakan (Northern Persian Gulf), by emphasizing on the dominant families

Polychaeta worms are the large population of Annelidae. Almost %63 of all species of Annelidae is belong to the class of polychaeta. They are important in food chain. They are important from the point view of biological studies. They are very important in indicating of different pollution of their environmental. The purpose of the present study is to identify and classify polychaeta in east cost of the Persian Gulf, Bahrakan. This study was done from April to September, 2013. Sampling was carried out by grub device (Model Van Vienna 0/0625 square meters of surface area). More over environmental factors such as temperature, salinity and water depth, were observed.14 families Syllideae, Spionidae, Sabellidae, Pillargidae, Nereidae, Nephthydae, Magelonidae,  Lesaretidae, Lumbrinereidae, Glyceridae, Gonaididae, Crossuridae, Capitellidae, Ampharetidae, from 2 Order Errantia and Sedentaria of Class Polychaeta and Phylum Annelidae were determined. The dominant family of all was Nereidae in two season spring and summer with frequency value of 22.77%.