The proximate composition of an endangered fish Ompok pabda from biofloc culture system was estimated in the current study. Major nutrient composition in raw and dry fish particles, such as crude protein, fat, ash, crude fiber, nitrogen-free extract and moisture content were assessed. The protein, lipid, ash, crude fiber and nitrogen-free extract (dry matter) contents (%) of O. pabda's flesh in fresh and dried conditions were 26.08±2.13 and 99.23±0.21, respectively, while the rest was moisture content. On the other hand, in the case of bone, the protein, lipid, ash, crude fiber and nitrogen-free extract (dry matter) contents (%) in fresh and dried conditions were 27.98±1.84 and 97±0.28, respectively, and the rest was moisture content.  This study supports the idea that biofloc cultured fish as a good source of nutrients might help to decrease the nutrient deficiency in people's diets, aligned with a possible increase in supply through biofloc cultured species to sustain its resources in poor countries.