Because crabs are rich in nutrients, and they live in water, many bacteria will be stored in their bodies. Once they die, the nutrients in their bodies will be quickly decomposed into substances harmful to the human body. Although the temperature in the cold room of the refrigerator is low, it can inhibit the reproduction of bacteria and play a role in keeping food fresh, but if they are kept for too long a day, they can generally be eaten for 2-3 hours. After this time, crabs will produce substances harmful to the human body and continue to eat.

2 Can crabs be killed and put in the refrigerator for tomorrow? You can't eat them in cold storage, but you can eat them in frozen storage.

After the crab is killed, if it is placed at room temperature, it will immediately breed a large number of bacteria, which will lead to the gradual deterioration of the crab. It needs to be stored in the refrigerator at low temperature as soon as possible. If it can be cooked within 4 hours, it can maintain the delicious taste of the crab in the freezer. However, if it is placed overnight, it needs to be stored in the frozen layer, otherwise the dead crab will have food health risks.

Because the crab smell of frozen crabs is much heavier than that of fresh crabs, some people who don't like the smell will find it difficult to eat if they eat them by steaming crabs. In addition, the crab meat of frozen crabs will become soft and a little loose due to the precipitation of water. It is suggested that frozen crabs should be eaten by frying and stewing, and some ginger and pepper should be added to remove the smell, which will make their smell lighter and taste slightly better.

3 Can crabs be eaten if they die in freezing? Dead crabs in the frozen layer can be eaten.

Because the temperature of the frozen layer is relatively low, generally below zero, food can be frozen, which has an inhibitory effect on bacteria and various enzymes. Although the crab freezes to death, it will not produce bacteria in the body and cannot secrete histamine at low temperature, so it can continue to eat. Generally, crabs can be preserved for 3 months without changing taste and deterioration under the condition of quick freezing and not thawing halfway.

Note that live crabs put into the frozen layer must not be thawed halfway, otherwise the thawed crabs are easily invaded by microorganisms such as bacteria, leading to deterioration, especially the resistance of paragonimiasis cysts in fresh water crabs is very strong, and even frozen dead crabs are prone to food poisoning, so it is better to eat frozen crabs within one month.

4 How to judge how long the crab has died The specific time of the crab's death needs to be judged by the machine, and the life experience cannot be specifically judged. However, if the crab has the following phenomena, it means that the crab has died for a long time and is inedible.

1, crabs die for a long time, and their shells will be softer.

2, the crab is too light, which also means that it has been dead for a long time.

3. Crab legs have no vitality, which is also one of the signs of long death.

4. Under normal circumstances, raw crabs have a fishy smell, but if they have a rancid smell, it means that they have died for a long time.