The fishing line is the sense organ for fish to feel the current. There is a layer of scales on the fish's back called lateral line scales, and there are many small holes in the lateral line scales, which are directly connected with the fishy smell in the fish, while some smells in the external environment, such as the earthy smell in the water, are directly attached to the fishy smell through the small holes.

The fishy lines of grass carp, crucian carp and carp are obvious and easy to take out, but the fishy lines of marine fish are not as obvious as those of freshwater fish. It is mainly used to perceive external stimuli and the strength of smells. The fishing line will have some earthy smell in the water, and it will naturally remove some fishy smell after removal.

Fish deodorization method:

Now try to kill fish and eat fish. The fishy smell of fish is mainly caused by trimethylamine not being oxidized, but this oxidation has been maintained when the fish is still alive, and it is gone when the fish dies. In order to reduce the fishy smell of fish, it is best to kill the fish before eating. If there are a lot of fish, it needs to be frozen after some treatment.

It is best to stew the fish for two hours, because when the fish dies, it will produce some harmful substances, which can be discharged in about two hours. If you start cooking after the fish is processed, it may increase the content of harmful substances in your body, but after waiting for two hours, not only the content of harmful substances will decrease, but also the smell will become less strong.

Refer to the above content: Baidu Encyclopedia-Fishing Line