1, the refrigerator is fresh. If you want to keep live crabs overnight, you can tie the crab claws and feet with a rope, then put them in a plastic box and put them in the fresh-keeping layer of the refrigerator. Generally speaking, live crabs can be kept for about 3 ~ 5 days, and crabs will not die, because crabs will hibernate at low temperature.

2. Keep water and keep fresh. Put live crabs one by one into a plastic basin, don't let them overlap, and then add water to it until the crabs are as tall as their bodies, so as to keep them moist. Crabs can still remain active the next day. Remember not to inject water into the crab, otherwise it may cause the crab to suffocate and die.

3. Eat and gain weight. If you want to keep too thin crabs for a few days, you can put them in a bigger basin or pool and occasionally give them sesame seeds, broken eggs and yellow wine, which will not only preserve live crabs, but also play a role in fattening them.