A better way is to cover the crabs tied by feet with a wet towel and put them in the refrigerator. The temperature is preferably 3-6℃, but don't leave them for too long, because the longer the time, the greater the consumption of crabs and the less delicious the taste.

cover the steamed and cooked crabs with plastic wrap and put them in the freezer. However, direct freezing is easy to make cooked crabs lose water and become very dry and unpalatable. When it is frozen, it can be frozen together with the soup for boiling crabs, which can better keep the fresh flavor of crabs.

Extended information

The common cold storage temperature of food in refrigerator is 4-8℃. In this environment, the growth rate of most bacteria will slow down. However, some bacteria are psychrophilic, such as Yersinia and Listeria, which can grow and multiply rapidly at this temperature. If you eat food infected with such bacteria, it will cause intestinal diseases.

In the freezer of the refrigerator, the temperature is generally around-18℃. At this temperature, bacteria are generally inhibited or killed, so the food stored in it has a better fresh-keeping effect. But freezing does not mean that it can be completely sterilized, and some bacteria with strong freezing resistance will survive.

Reference: People's Daily Online-Can't steamed crabs stay overnight? What should I do if I can't finish eating crabs?