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Scientific Name: Ompok bimaculatus (Bloch, 1797)
English Name: Butter Catfish
Bengali Name: Kani Pabda
Availability: It is distributed throughout the country (Parween 2007) but particularly reported from the Bangali River of Bogra (De et al. 2011), Halda River of Chittagong (Alam et al. 2013), Tanguar and Hakaluki Haor (Pers.obs.), Brahmaputra-Jamuna (Rahman and Akhter 2007), River Mahanada, Padma River (Mohsin et. al. 2013).
Habitat and Ecology: It occurs in streams and rivers of all sizes with sluggish to moderate currents. Prefers quiet, shallow, muddy water to live. It is found also in canals, beels and inundated fields. This fish is omnivorous and predatory in nature. This catfish feeds on the crustacean larvae, fish fries, zooplankton, algae and small portion of sand and mud. (Parween 2007).
Justification: Ompok bimaculatus is reported as fairly distributed species, but it is less common than its congener. The threats to the species also persist and unlikely to halt or reverse in the near future. It is conjectured that this species has started to disappear from many water bodies and the population decline is also continuing at a significant rate due to habitat shrinkage caused by siltation, wetland conversion and other factors. Recent studies suggest that the population abundance of the species has probably declined by more than 60% during the last two decades. Hence, considering the declining population trend, the earlier Endangered Category could be retained for this species though the Extent of Occurrence and Area of Occupancy exceed the threshold values of Threatened Categories. Therefore, this species has been assessed as Endangered.