There are four parts of the crab that cannot be eaten: 1. Crab gills: the respiratory organs of the crab, which are relatively dirty. It must be taken out when the crab shell is opened.2. Crab intestines: contain crab poop.3. Crab stomach: a triangular bag hidden in the crab yolk. Like crab intestines, it also contains crab poop. 4. Crab heart: also called crab hexagonal plate. This is hard to find in the crab yolk, but it is hexagonal and looks conspicuous. Be sure to pay attention to the crab you eat. You must have fresh crab. These parts are the filtering and metabolic organs of the crab and have no use. They also contain a lot of bacteria and parasites, which can easily lead to food poisoning.

First, crabs are so delicious, which one can not eat?

Crab is very cold, so some people are not recommended to eat. For example, pregnant women, cold and diarrhea, weak spleen and stomach, coronary heart disease, hypertension, arteriosclerosis, hyperlipidemia and other patients. Because crabs are cold, it is easy to get diarrhea. In addition, crabs may be a potential allergen for the fetus in the abdomen. Therefore, it is better for pregnant women not to eat crabs. People with cold and diarrhea, weak spleen and stomach are also advised not to eat. It is easy to cause diarrhea. In addition, the cholesterol content in crab yolk is high, so patients with coronary heart disease, hypertension, arteriosclerosis and high blood fat should also eat less or not eat.

Second, how to pick fresh crabs

The first step is to look at the color. The back is dark green, hard, shiny and fatter.

The second step, look at the navel. A crab with a protruding belly button is usually full of cream and fat. The sunken ones are among the not-so-fat ones.

The third step is to pinch the softness and hardness. Harder crabs will have more meat, while softer crabs mean they're empty and meatless.

Step four, smell. Fresh crabs will have a slight fishy odor, but if they are not fresh, they will give off an unpleasant fishy smell

Finally, crabs are classified into male and female, with males having triangular navels and females having predominantly round navels. Cooked crabs are best eaten while hot. If it is cold, it will not taste good and will have a fishy odor. Crabs can not be eaten overnight, in easy to cause will lead to food poisoning