1. The gills, intestines, stomach and heart of swimming crabs cannot be eaten. Crab gills are the vocal organs of hairy crabs. These cannot be eaten because they are very dirty and contain a lot of bacteria.

2. Crab intestines and crab stomach are the digestive organs of crabs. There are a lot of food residues and feces in them. Crabs themselves are mainly scavengers, so the secretions inside are very dirty. .

3. Crab heart is also called crab hexagonal plate. This thing is not easy to find in crab meat, but it is hexagonal and looks very eye-catching. This part cannot be eaten.

4. Crabs are cold food. When choosing crabs, you must choose live crabs, not dead crabs. Dead crabs will produce toxins in their bodies, so such crabs cannot be eaten directly.

5. After the crab dies, the bacteria in the crab will multiply rapidly and spread into the crab meat. The longer a crab is dead, the more histamine and histamine-like substances accumulate in its body. After people eat dead crabs, histamine can cause allergic food poisoning, so you must choose live crabs when eating them.

6. Although there are many types of crabs, they all grow in mud and feed on animal carcasses and humus. Therefore, crabs must be cleaned before eating, and the inedible parts must not be used to avoid waste. Eat it, it will do some harm to people.