Different from other fish, hairtail doesn't have thick scales on its surface, but this doesn't mean hairtail doesn't have scales, but in the process of evolution, the scales degenerate, and after the scales degenerate, a silver film is formed on the surface of the fish. So the silver film with the surface is its degraded fish scale.

We generally don't eat fish scales, and we scrape them off before eating fish. But for hairtail, there is no need to scrape off its silver film. This layer of silver film of hairtail is mainly composed of fat. Besides fat, this layer of silver film also contains nutrients such as protein and iron.

Some people may think that hairtail will smell fishy if the silver film is not scraped off, but it doesn't! The fishy smell of hairtail is not produced by silver film, but by fat and protein, which is tasteless. The reason why hairtail smells fishy is that it has the smell of black film in the body and some dirty things in the body. Clean up the black film and dirt, and the fish won't smell.

Morphological characteristics of hairtail;

Hairtail, banded body, flat side. Hairtail has free spines in its abdomen. When swimming, it swims upward by swinging its body without paddling with fins. Prey on shrimp, squid and other small fish. Migratory fish.

Hairtail is very varied and gluttonous, and sometimes it eats the same kind of food. There is a habit of moving vertically day and night. During the day, the group inhabits the middle and lower layers of the ocean and moves at the bottom of the sea at night. Hairtail has a life span of about 8 years. The average body length of 1 year-old fish ranges from 18 to 19 cm, and its weight is 90 ~10/0 g. It can be propagated in the same year, and the second-year-old fish can grow to about 300 g.