The main reason is that some people think that the environment where they grow up is too dirty and may contain bad ingredients.

In Guangdong and Guangxi, pond lice and catfish are different.

Compared with catfish, the head of pond lice is flat and hard, with two sharp corners, and it is easy to be stabbed by hands. Lice in ponds have more beards than catfish (I can't remember how many).

Before the introduction of Egyptian pond lice, pond lice (now called soil pond lice) and catfish were generally wild. Tanglouse tastes better than catfish, and its price is more expensive than catfish. Catfish has a greasy liquid, which we locals used to call snot fish, which means contempt.

dust

After the introduction of pond lice, its quality is difficult to compare with that of pond lice because of its fast growth, artificial feeding and dirty fish ponds. Wild soil pond lice are rare, while Egyptian pond lice escape to the wild and breed in large numbers, which is difficult for people to distinguish.

Don't tell me which are pure soil pond lice. It is difficult for vendors to distinguish Egyptian small pond lice from wild pond lice (I have caught countless pond lice since I was a child, and now I have no ability to distinguish the two), and the value of pond lice is backward.

Fish catfish