abstract: The present paper deals with ecological and morphometric features of Ophelia bicornis Savigny in Lamarck, 1818 collected monthly from the Sinop Peninsula (Black Sea, Turkey) between August 2009 and July 2010 from 4 stations. This study aimed to report the polychaete for the first time from the Turkish coast of the Black Sea and to determine the population density of O. bicornis on the coasts of the Sinop Peninsula. A total of 699 individuals of O. bicornis were collected. The maximum and minimum
journal: Turkish Journal of Fisheries and Aquatic Sciences