What is the big fish that Chongqing people say?

The big fish mentioned by Chongqing people is the cold water plateau fish. Clam fish is slightly cylindrical, with a wide and flat head and a large mouth. The lower lip has tassels, the lower lip has a wide oval sucker, the center has a fleshy pad, and the periphery has a mastoid, which is unnecessary. The dorsal fin has no hard spines, the outer edge is concave, and the lateral fin is horizontal. It is a benthic fish. The sucker absorbs underwater stones and feeds on algae and plant debris attached to the stones. Common body length is 200-300 mm, up to 700 mm.