1. Cryopreservation. A large amount of marine fish can be kept fresh in a cold storage, and the temperature can be controlled between zero and three degrees. However, if you want to store it for a long time, it is best to freeze it. Fish is a common food in life and can be divided into two types: freshwater fish and marine fish. Generally speaking, most of the freshwater fish you buy in life are live, while most of the sea fish are frozen.

2. There is also chilled fish, which is relatively fresh and tastes better than frozen fish. For fresh fish, it is best to clean the fish before putting it in the refrigerator, then put the fish into a fresh-keeping bag, and then store it in the refrigerator. The purpose of this is to prevent dryness and the spread of fishy smell.

3. Freshly caught marine fish often die soon after emerging from the water due to the different water layers in which they grow, especially those in the middle and lower layers of the sea, such as: Carpidae, Loachidae, and Perchidae. He died almost as soon as he fished out of the sea. Therefore, if you want to eat fresh and delicious sea fish, you must do a good job in preserving the freshness of sea fish.