Tangra is a name given to several species of catfish of the rivers and estuaries of India and Bangladesh. One of them is Mystus cavasius (Hamilton, 1822). a large scaleless fish found in Bangladesh, India and Burma. The fish is usually found in fresh water and are mostly available in rivers, canals, beels, ponds, ditches and inundated fields. It is good to ear and as a source of protein to the people of Bangladesh.