1, red river group of fish, also known as long-nosed shad, also called catfish. In various places in the red river group has a different name, Shanghai area called "catfish mouse", Shu around the name of the river group, Guizhou area called "Xi fish". Black river group also known as black catfish, is a kind of carnivorous fish living in the bottom of the river.

2, different growing environments. The black river group often in the slow current and deep water, rocky waters inside the bay life. Red river group is a warm water fish, best suited to grow in the water temperature of 25 ℃.