Crabs have ten legs. Normal crabs have eight legs that can walk, and two claws that don't have the function of walking. The crab's chest has five pairs of appendages, which are called pectoral feet. The front pair of appendages are equipped with strong claws, which can be used for foraging. The other four pairs of appendages are crab feet. The appearance of these four pairs of appendages is unique and interesting, and most of them walk sideways rather than straight.

Most kinds of crabs live in the sea or offshore areas, and some live in fresh water or land. It depends on the mother crab to give birth to small crabs. Every time, the mother crab will lay a lot of eggs, the number can reach more than millions. Crabs rely on the geomagnetic field to judge their direction.

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Precautions:

1, crabs should be steamed and cooked thoroughly, and raw crabs should not be eaten. Some people get sick because they haven't washed the crabs thoroughly, or because they eat drunken crabs or pickled crabs raw, and eat germs or parasites in the crabs.

2, crabs should eat fresh, dead crabs should not eat. After death, the rigidity period and autolysis period of Eriocheir sinensis are greatly shortened, and the bacteria in the crab will multiply rapidly and spread into the crab meat, causing vomiting, abdominal pain and diarrhea. The shell of the fresh crab is bluish-black, with luster, full navel and Bai Jie abdomen. However, the shell of the dying crab is yellow, and the crab's feet are soft, so it is difficult to turn it right.

3, crabs should be steamed and eaten now, not stored. In case you can't finish eating, the rest must be kept in a clean, cool and ventilated place. When eating, you must return to the pot and cook it thoroughly.

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