Answer: According to the habits of crabs, dead crabs are not recommended to eat. If the crabs are not dead for a long time, they are refrigerated or can be eaten.

Crab preservation methods: 1, refrigerator preservation (preservation time: about 3 days). Choose vigorous crabs, tie up the crab's feet and gates to reduce the crab's physical exertion, and then put them in the freezer of the refrigerator and cover them with a wet towel to preserve them. When you eat every day, pick the less energetic ones to eat first, and keep the energetic ones for further preservation. The way to tell if a crab is vigorous or not is to touch its eyes lightly with your hand and eat it first if it is not responsive.

2. Plastic bucket/pot preservation (preservation time: about 7 days). Prepare a 30-50 centimeters high plastic bucket/pan with a smooth inner wall that is not easy to escape. Put the crabs into it, don't layer them; then add water to half of the crab's body to facilitate moisturizing, don't bury all the crabs, if the water is too deep, the crabs will be suffocated because of the lack of oxygen and die. Bucket / pot do not cover, check every day, the lack of vitality of the crab in time to eat, using this method of preservation, the temperature is not high when preserved can be more than 5 days.

How to kill crabs: 1, take chopsticks from the crab between the eyes directly into the poke, and follow the trend of slightly outward turn, so that the crab is fake dead, but the meat is still maintained in the fresh fresh Q state.

2. The edges of the crab's left and right sides are the most fragile and soft parts of the crab, so you can lean against the edge of the table and use your strength to peel off the crab's shell.

3. After peeling off the shell, clean out the food guts that stick to the center of the shell.

4, and then remove the long mesh gills, note that the gills of the crab must be removed cleanly, so as not to have a bitter flavor. Then use a brush to scrub the outer and inner layers of the crab.

5, and then peel the crab abdomen triangle or peach-shaped abdomen, this is the crab's excretion, if you are worried about cleaning is not clean enough, the abdominal shell is the easiest way to peel.

6, and then take the knife to chop down the crab chelae, and use the back of the knife to slap the crab chelae to make cracks.

7, and then chop off the crab head tentacles and the first section of the crab feet part, because the crab head has a bitter taste, will affect the flavor, the first section of the crab feet touch the ground so it is more dirty, should also be removed.

8, and then finally the crab from the center in two chopped, and then according to the needs of cooking cut into smaller pieces can be.