It mainly lives in the middle and lower layers of rivers, lakes, reservoirs and pits, mostly in coastal areas, hiding in grass, rocks or deep water during the day, and frequent foraging activities at night. After autumn, living in deep water or sludge overwinters, and the degree of food intake is also weakened.
Carnivorous fish mainly prey on small fish, such as rice sticks, crucian carp, goby fish, ear fish, carp, loach, etc., and also eat shrimp and aquatic insects. Mainly swallowing, the role of teeth is mainly to prevent food from escaping.
Extended data
Origin of catfish effect:
There is nothing very special about catfish itself. However, since some fishermen used it as a tool to ensure the survival of sardines in long-distance transportation, the role of catfish has been paid more and more attention.
Norwegians like to eat sardines, especially live fish. The price of live fish in the market is much higher than that of dead fish. So fishermen always try their best to get sardines back to the fishing port alive. However, despite all efforts, most sardines died of suffocation in the middle. But there is a fishing boat that can always get most sardines back to the fishing port alive.
The captain kept the secret strictly. The mystery was not solved until the captain died. It turned out that the captain put a catfish with fish as its main food in a fish tank full of sardines.
After the catfish entered the fish tank, they swam around because of the unfamiliar environment. Sardines are very nervous when they see catfish. They rush from side to side, avoid everywhere and speed up their swimming.
In this way, the problem of lack of oxygen in sardines will be solved, and sardines will not die. In this way, the sardines returned to the fishing port alive and kicking. This is the famous "catfish effect".
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Baidu Encyclopedia-Catfish Effect