The black paste in crab body is called crab paste, which is mainly composed of semen and organs in the seminal vesicle of male crab. It is translucent jelly-like and nutritious. In the process of eating crabs, it is not advisable to drink tea or eat persimmons to avoid affecting your health. When storing crabs, cover them with a damp cloth and put them in the cold storage layer of the refrigerator.

There is a yellow liquid in the meat of Portunus trituberculatus, which may be crab yellow of Portunus trituberculatus. However, crab roe is liquid, because crabs are not completely steamed. It is recommended to steam Portunus trituberculatus for a few minutes before eating.

Preventive measures for crabs

Crabs should be steamed and eaten now, not stored: if they can't be eaten, the rest must be kept in a clean, cool and ventilated place, and must be cooked and steamed thoroughly when eating.

After the death of Eriocheir sinensis, the rigidity period and autolysis period are greatly shortened, and the bacteria in the crab will multiply rapidly and spread into the crab meat, causing vomiting, abdominal pain and diarrhea. Fresh crab shells are bluish-black, shiny, with full navel and Bai Jie abdomen. But the shell of the dying crab is yellow, and the crab's feet are soft, so it is difficult to turn right.