Abstract

• A total of 120 polychaete species belonging to 89 genera and 35 families were collected from 10 intertidal zone of Myeik Coastal Areas (Light-house, Daung-kumaw, Kyauk-phya, Pahtaw-west, Masanpa ,Maing, Panataung, Done-pale-aw, Sha-aw and Kyun-mweyar) for a period of two years from June 2010 to May 2012. The most speciose family was spionidae (12species). Species belonging to families Capitellidae, Neredidae, Orbiniidae, Glyceridae and Lumbrineridae were abundant. Polychaetes ranged from 0 to 172 individuals collected with the highest count recorded in Light- house Station (1003 individuals with 72 species) and the lowest count in Pahtaw-west Station (66 individuals with 15species). The higher composition in order of abundance was Glycera sp., Heteromastus similis and Notomastus fauveli. The highest species diversity was found in Panataung Station (3.62), near mainland and Done-pale-aw Station (3.22) away from mainland. The lowest values for species diversity were recorded in Daung-kumaw Station (2.26) and Sha-aw Station (2.73).