2, put it in a bucket, but the height of the water can't pass the crab's body, otherwise the crab will die of lack of oxygen. It's best to have a bathtub at home, because the bathtub is very smooth and crabs can't climb out.
How to buy crabs
1. Look: the crab's carapace is blue-gray, shiny, with a white abdomen and bright colors. There is no mark on the upper navel, and the limbs are firmly connected and arc-shaped.
2. Weighing: For sea crabs whose visual appearance meets the requirements, weigh them by hand one by one, and those that feel heavy or heavy are fat crabs.
3. Peeling: Peel off the umbilical cap of the sea crab. If the crab roe condenses in the shell, it is a good crab.
4, pull: the legs of the sea crab are intact, and the crab legs are slightly elastic, indicating that they are fresh sea crabs; If the crab is not fresh, gently pull the crab leg, which is not only weak, but also easy to break.
5. Smell: If you smell the fishy smell of sea crabs, it means that the sea crabs have gone bad and can't be eaten any more. Eating spoiled sea crabs is easy to cause food poisoning.
Extended data
Precautions for storing crabs:
Either way, tie the crab's feet, which will reduce the crab's physical consumption and the crab will not kill itself so easily. Also, if hairy crabs are too thin or want to be stored, you can feed sesame seeds or broken eggs and add some yellow wine to fatten them up.
Tip: Keeping crabs alive doesn't mean soaking them in water.
Hairy crabs need water to live, but they can't soak in it. Hairy crabs need a certain amount of water to keep the humidity of the environment and reduce the temperature, but they can't soak in water, especially in deep water. Hairy crabs need to breathe, and they will suffocate if they are soaked in water for a long time.
Precautions for eating crabs
Choose fresh and live crabs, not raw and drunk crabs. Crabs are omnivores and even eat the carcasses or humus of other animals. Its body surface, gills and gastrointestinal tract are covered with all kinds of bacteria, sludge and even parasites. Therefore, you must scrub clean before eating crabs. Don't eat internal organs such as gills and intestines. Be sure to steam them before eating.
It is not advisable to eat too much. Protein contained in crabs and cholesterol in crab roe are relatively high, which is not conducive to one-time digestion and absorption. Therefore, the average person should not eat crabs more than 1 kg at a time and not more than 3 times a week.
People's Daily Online-How to Choose and Store Crabs with Itchy Feet in Autumn Wind