1, keep fish fresh in the refrigerator. Remove scales, gills and internal organs in time after buying back fish, and then wrap them in cloth bags or plastic bags. If it is eaten recently, it can be put in the freezer. If you want to store it for a long time, you should put it in the refrigerator. Fish stored in the refrigerator usually have a shelf life of less than 4 months. After a long time, although it will not rot, the umami flavor will gradually decrease.

2. Soak the fresh fish in hot water and hide it. First, fish are soaked in hot water at 88℃ for 2 seconds to kill bacteria and other yeasts. After the surface of the fish turns white, keep it on ice. In this way, the preservation time of fish can be extended by 2 times.

3. Keep the fish fresh with mustard. Mustard is not only a condiment, but also a preservative for fish. After mixing mustard with water, put it in a small dish, put it in a sealed container with fresh meat and fish, and put it at normal room temperature. Fresh meat and fish can be preserved for 4 days without changing their taste.