Catfish. Why can't we spend the winter?

The reason why catfish can't overwinter is mainly because of the low temperature in the overwintering pool. In winter, it is difficult for catfish to survive for a long time in water temperature below 0.5 degrees Celsius. In particular, catfish introduced from warm areas and raised in high density have poor tolerance to low temperature, so it is necessary to control and reduce the occurrence of low temperature as much as possible to prevent the water temperature from dropping sharply due to mechanical stirring and the bottom water temperature from falling below 2 degrees Celsius. At the same time, it is also necessary to prevent catfish from getting into the soil to keep warm and leaving their original places in cold weather.