Kampus C, Jln. Mulyorejo, Surabaya-60115, Indonesia
Polychaete is one of dominant organism groups which composed benthic macrofauna in soft-bottom substrate in sub-tidal zone. These organisms have a very important ecological role in coastal waters. But, there is still less study was be done correspond this topics due to the limited the species determination keys. The purposed of this research was to give the information about biodiversity of polychaete species and its visualization which could be used further as species identification keys of polychaetes. Polychaetes samples were collected using Ponar dredge at 15 sampling point and filtered using a sieve with 0.5 mm in diameter pores. Specimens were characterized, visualized, and then identified to determine the families and species levels. This research obtained 115 species and 63 species were successfully identified, including 23 families. Polychaete families with the largest number of species (7 species) were Glyceridae, Neriidae, and Phyllodocidae, followed by Capitellidae (6 species), Cirratulidae, Maldanidae and Spionidae (4 species for each family) and the others: 2 families (3 species), 4 families (2 species), and 10 families (1 species).