Fish is very important part of our aquatic system. Present study was conducted on Tenughat Dam of Bokaro district, Jharkhand during the period of April 2016 to March 2017 and recorded 31 fish species belonging to the five order and eleven Families. Cyprinidae was the most diversified fish family among all the group.Among the 31 fish species 13 are under Cyprinidae,04 species are under Channidae,03 species are under Bagaridae,02 species of each are under Cichlidae, Ambassidae, and Mastacembelidae where as 01 species of each are under Notopteridae, Anabantidae, Siluridae, Sisoridae and Claridae were found. Further, Study revealed that 01 species of each Cyprinidae, Siluridae, Sisoridae and 02 species of Cichlidae are under IUCN-NT category whereas 01 species of Anabantidae is in IUCN-VU category and rest are under IUCN-LC category.From investigation it is also found that biodiversity of dam decline day by day due to natural as well as anthropogenic activities.
