1, live crabs can't be eaten if they freeze to death in the fresh-keeping layer, but they can freeze to death in the frozen layer. Because of the low temperature of the frozen layer, it can inhibit the crab from producing bacteria, and the toxic substances in the crab can not be secreted at low temperature. To tell the difference between life and death of a crab, you can tell it by seeing if it can move.

2. Live hairy crabs can be packed in a plastic bucket with a height of 30-50 cm if they can't be eaten all at once, and then the bucket can be stored in a cool place for about 3-5 days. Or tie the feet and claws of hairy crabs, cover them with a wet towel, and put them in the refrigerator for cold storage. Usually, they can be kept alive for 3-5 days.

3. Cooked crabs need to be packed in a sealed fresh-keeping box, and then stored in a low-temperature refrigerator or frozen storage. The low-temperature environment is used to inhibit the proliferation of bacteria and ensure the flavor of crab meat. Generally, it can be stored in cold storage for about 1 day, but it is appropriate to freeze for less than 3 days. The longer it is kept, not only will the flavor and taste of crab meat decrease, but it may also deteriorate, which is harmful to health.