Catfish mainly live in rivers, lakes, reservoirs, pits and ponds in the middle and lower levels, mostly in the littoral zone activities, more hidden in the daytime in the grass, under the rocks or deep water, night feeding activities are frequent. After the fall, it resides in deep water or sludge to overwinter, and the degree of feeding is also weakened. Carnivorous fish, predatory objects are mostly small fish, such as meal strip, crucian carp, _ tigerfish, wheat fish, carp, loach, etc., but also eat shrimp and aquatic insects. Swallowing-based, the role of the teeth is mainly to prevent food from escaping.