Based on the characteristics you have provided, it is likely that the fish species you have is a type of catfish. In particular, it may be a species in the genus "Heteropneustes", which are known for having three pairs of long barbels on the central side of the mouth and an elongated body. Some species of Heteropneustes have a whitish cream coloration. However, without a picture or a more detailed description, it is difficult to provide a specific scientific name for the species you have captured. I recommend consulting a fish taxonomist or ichthyologist for a more accurate identification of the species.
The fish you have described is a freshwater fish species that belongs to the class of Osteichthyes, which are also known as bony fish. This fish species has three pairs of long barbels on the central side of the mouth, an elongated body, and a whitish cream coloration. It was captured from River Rajouri, a tributary of Chenab river in Jammu and Kashmir. Without further information and a proper examination, it's difficult to provide a specific scientific name for the species. However, it could be a catfish of genus Heteropneustes. I would recommend consulting a fish taxonomist or ichthyologist for a more accurate identification of the species.