1. Add a few drops of white wine into the fish’s mouth, then place it in a cool, dark place and cover it with a breathable cover to extend its survival time.

2. It can be kept fresh for fifteen days in supermarket refrigerated cabinets.

3. Grind the mustard seeds into powder, mix it with fresh fish and put it in a sealed container. It can be kept fresh for four to five days.

4. Put the killed fresh fish into about 2% salt water and soak it for 15 minutes. The treated fish will not go bad even if it is stored at 30℃ for several days.

5. Sprinkle diluted vinegar on the fish and it can be stored for one day even in the hot summer.

6. Blindfolding. When buying fish, soak a piece of tissue paper with water, cover the eyes of the fish, and put it in a plastic bag. There is no need to fill the plastic bag with water. After ten or twenty minutes, or even an hour, the fish will not It will die. Take the fish home, put it in the water, remove the wet paper covering the fish's eyes, and it will come back to life in a short time.

7. Low temperature preservation method. Sometimes, if you buy too much fish and can’t finish it all at once, you can use the low-temperature preservation method. Just wash the fish, put it in a plastic bag or put it on a plastic tray, put it in the freezer of the refrigerator for quick freezing, and then move it to a low temperature room. According to different insulation and storage periods, low-temperature preservation can be divided into three types.