Crabs will hurt if they are steamed, if you can't afford to steam them, you can choose to release them.

The time of steaming crabs must not be very short, otherwise the bacteria and parasites inside the crab are not removed cleanly, which can easily cause diarrhea and abdominal pain and other symptoms. Steaming crabs should not be too long, otherwise it will affect the edible taste of crabs and reduce the edible value of crabs. Steaming crabs is best done in cold water, so as to ensure the integrity of the crab.

Expanded Information:

Crab with the prolongation of the time away from the water, the vitality will be gradually lost, taste will gradually deteriorate, and even toxic. The crabs will gradually lose their vigor and taste, and even produce toxic substances. Therefore, it is very important to make sure that the crabs are fresh and alive.

To determine whether a crab is alive, you can touch the crab's eyes, and the more intense response indicates that it is alive; you can also flip the crab belly up to see if it can turn over on its own to determine whether it is healthy enough to be alive.

You can also put your finger between the claws of the crab, such as the claws of the crab is strong, said the crab is strong enough; see whether the crab spit foam, leaving the water of the crab spit foam, is a live crab.

Baidu Encyclopedia - Crabs