Answer: West Bengal
Notes: Scientists in West Bengal have discovered a new estuarine fish species named Butis bargabhimae in the Rupnarayan River, a tributary of the Hooghly River near Tamluk, West Bengal. Butis bargabhimae belongs to the butid family, commonly known as gudgeon goby, which usually live in brackish water where rivers meet the sea. The species is unique because it has interorbital scales (scales between the eyes), unlike most related fish which have smooth areas there. It also has additional auxiliary scales across its body, making it structurally distinct. The fish shows clear light and dark bands on its pectoral fins, which are absent in similar species.
