Which of the following are the new species of freshwater catfish discovered in Idukki and Pathanamth...........

Explanation:

Along with the first 3 species Mystus menoni species of Catfish were discovered from the Manimala  river.  Catfish are freshwater, bottom-dwelling fish. Unlike other fish, they have no scales and are smooth-skinned. They are known   for growing whiskers, called “barbels,” at some point during their lifespan. Catfish use their barbels as feelers as they swim along the bottom of the various bodies of water  in which they live. There are 2,900 species of catfish  worldwide. They range in size from 1.5 to 2 in chesto more than 8 feet in length.