Vol. 3, Issue 5, Part A (2017)

Abstract
The present study deals with the fish diversity of Dhir Beel of Dhubri District, Assam, India where 72 number of fish species including 4 exotic fish species belonging to 53 genera under 25 families from 8 orders is recorded during the investigation period. Among the recorded fish species 2 species is recorded as vulnerable, another 2 species is data deficient, 7 species is near threatened, 58 species are least concern, 1 species is endangered and other 2 species are not evaluated. The different families recorded are Notopteridae, Clupeidae,Nemacheilidae, Cobitidae, Belonidae, Cyprinidae,Badidae, Ambassidae, Anabantidae, Channidae, Gobiidae, Sisoridae, Amblycipitidae, Pangasidae, Osphronemidae, Nandidae, Bagridae,Clariidae,Chacidae, Heteropneustidae, Schilbeidae, Siluridae, Synbranchidae, Mastacembelidae and Tetraodontidae. The present study shows that Cyprinidae is the most dominant family with 26 number of species contributing about 37% of the 25 recorded family followed by Bagridae (11%). The present study provides an idea about the richness of fish fauna in Dhir beel.