1, in addition to the viscera salt water immersion method. Can be in the case of not washing, not scraping the scales, the fish's internal organs hollowed out, placed in 10% salt water soak, can be preserved for several days without deterioration.

2, mustard preservation method. Take the appropriate amount of mustard coated on the surface of the fish body and the inner cavity parts (has been opened), or evenly spread around the container of fish, and then the fish and mustard placed in a closed container, can be preserved for 3 days without deterioration.

3, hot water treatment method. Remove the viscera of the fresh fish, into the hot water (80 ° C - 90 ° C) will not open, a little pause to fish out, at this time, the appearance of the fresh fish has changed since, and then put on ice storage, can be treated with hot water than the fresh fish preservation of twice as long as the fresh fish.

4, steam treatment method. Clean fresh fish, cut into words suitable for cooking shape, packed into a breathable plastic bag, the whole bag of fish in the hot steam sterilization, can be kept fresh for 2-3 days.

5, alcohol treatment method. The fresh fish mouth pry open, the white wine drops into the mouth, put dry and cool ventilated outside can prevent corruption and deterioration, in the packed fresh fish fish body cut a few knife flower, will be appropriate amount of beer sprinkles poured into the fish and fish body cavity, can be preserved fresh before cooking.

6, live fish freezing method. Put the fish directly into the refrigerator or freezer frozen. When you take it out and thaw it, the fish will be as fresh as live fish.