1, different living environment: Qingjiang fish mainly inhabit mountain spring water, with fresh water quality, no pollution source and sufficient dissolved oxygen. On the other hand, catfish mostly live in still water environments such as swamps or ponds.

2, the fish mouth is different: Qingjiang fish's fish mouth is flat and wide, the beard is relatively short, * * * two whiskers, while catfish's fish mouth is arc-shaped, relatively round, with a long beard and more than four whiskers.