1, catfish with eight whiskers can't be eaten. This kind of fish also grows fast, is resistant to hypoxia and pollution, and is very easy to raise. Because of this, some people will raise fish in seriously polluted water, which may cause problems and is not recommended to eat.

2. Catfish, also known as Tiger Fish and Tangyang, is characterized by no scales, sticky and slippery body surface, flat head and wide mouth, and four whiskers on the upper and lower jaws, which are widely distributed and mainly produced in the Yangtze River and Pearl River basins.