The downstream of the Umban Sari River was inhabit by numerous fish species. Information on the fish, however, is almost none. To understand the biodiversity of fish in that river, a study has been conducted from March to May 2016. Samplings were conducted weekly. The fish was sampled using several net types (mesh size 0.5-1.0 inch) and scoop nets. The fish sampled were identified based on Saan…