Crab is a kind of nutritious seafood, rich in protein, minerals and vitamins. However, once the crab dies, the bacteria and molds in its body will multiply rapidly, leading to deterioration. So when cooking crabs, be sure to keep them fresh and cooked. Generally speaking, crabs can be eaten without deterioration within 2 hours after death.

This is because bacteria and molds in crabs reproduce slowly and usually do not cause obvious deterioration within 2 hours after death. However, if the death time is too long or improperly preserved, crabs may deteriorate and produce toxins and other harmful substances, in which case they can no longer be eaten. When eating crabs, you need to cook them thoroughly. It is suggested to cook in boiling water for 15-20 minutes to ensure that the bacteria and molds in crabs are completely killed.

Method for preserving live crabs

1, put in the freezer: put the live crabs in a clean container, and then put them in the freezer. Keeping the temperature between 5-8 degrees Celsius can prolong the survival time of crabs.

2. Keep moist: adding a proper amount of wet towel or wet seaweed to the water to keep the environment where crabs live moist will help to prolong the vitality and life span of crabs.

3. Avoid squeezing: Don't pile crabs together to avoid squeezing damage. It's best to scatter them in containers to keep enough space.

4. Avoid direct sunlight: Avoid exposing crabs to sunlight, because sunlight will accelerate the metabolism of crabs and lead to dehydration.

5. Change the water regularly: change the water in the container at regular intervals to keep the water clean and fresh.