This is crab gills. After two rows of "small fans" open the crab shell, two rows of gray fan-shaped soft tissues on the crab body are crab gills. Crab gills are the respiratory system of crabs and are not suitable for eating.

In addition, when I opened the crab shell, I saw some crab roe on the shell, and the crab stomach was hidden in the crab roe of the shell. Crabs have a dirty stomach and are not recommended. "hexagonal plate" under the black film? Chinese medicine often says that crabs are extremely cold, and crab hearts are the most important. The crab's heart is a white hexagon, which is generally located under a black film in the middle of the crab and cannot be eaten.

Extended data:

Precautions for eating crabs

1, steamed thoroughly, do not eat raw crabs.

River (lake) crabs feed on animal carcasses or humus, so the body surface, gills and gastrointestinal tract of crabs are covered with various bacteria and sludge. Some people don't get sick because they didn't wash the crabs clean, or because they ate drunken or pickled crabs raw and ate germs or parasites in crabs. Steamed before eating, there will be no such problem.

2, eat "fresh", dead crabs are not suitable for 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.

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