1. Put the catfish in hot water of 80 -90 degrees, let the mucus on the fish solidify, and then wash it away.

2. Rinse the mucus of the fish with salt continuously until the mucus on the fish is completely removed, and then rinse it with clear water.

3. Wipe the mucus off the catfish with baking soda, flour or starch, and then rinse it with clear water. The overall effect is also very good.

Most fish are covered with hard scales, but a few fish, such as eels, loaches and catfish, are covered with viscous liquid. Because their scales have degenerated, there are many special mucus glands in the directly exposed skin, which can secrete a lot of mucus and form a mucus layer.

The function of fish mucus:

1. Mucus can protect fish. Although it can't stop the impact of hard objects, it can prevent the invasion of poisonous bacteria and prevent harmful substances in water from entering the body from the skin.

2. With the existence of mucus, the skin of fish can be impervious to water, which is conducive to maintaining a constant osmotic pressure in fish.

3. With the mucus on fish, they can adapt to the change of salt concentration in water, and also reduce the friction of water, helping fish swim faster and more labor-saving.