1. Crab stomach: The "triangular bun" hidden in the crab roe. Where is the crab stomach? Open the crab shell and see some crab roe on the shell. The crab stomach is hidden in the crab roe of the shell. Crab stomachs are dirty and inedible.

2. Crab gills: two rows of "small fans". After opening the crab shell, the two rows of gray fan-shaped soft tissue on the crab's body are the crab gills. Crab gills are the respiratory system of the crab and should not be eaten.

3. Crab heart: The "hexagonal plate" under the black membrane? Traditional Chinese medicine often says that crabs are extremely cold, and the crab heart is the coldest. The crab heart is a white hexagon, which is usually located under a black film in the center of the crab.

4. Crab intestine: a black line from the crab stomach to the crab navel. The crab intestine is located in the triangle that can be broken open on the lower abdomen of the crab. Open the triangle and you can see a black line connecting the top of the triangle to the crab body.

Extended information:

1. Selection of crabs

1. Check the degree of connection between limbs and body

Fresh crab legs and lobe The body is tightly connected, and when the crab body is lifted, the legs do not sag. Stale crabs will obviously show signs of slackness at the rotatable joints between their limbs and body. If you lift the crab body with your hands, you will see that the limbs (legs) are sagging downwards.

2. Look at the "stomach mark" above the belly button

Crabs mostly feed on humus. After a period of time after death, the stomach contents of stale crabs will become rotten. There is a black mark on the ventral surface of the crab body above the umbilicus.

3. Whether the crab "roe" is solidified

The substance called "crab roe" in the crab is where various internal organs and reproductive organs are located. When the crab body is in the stage of rigor mortis, the "crab roe" is solidified. Crabs that are not fresh will be in a semi-liquid state. When the crab body deteriorates, it becomes even thinner. When you hold the crab body and turn it over, you can feel the flow inside the shell.

4. Look at the gills

The gills of fresh crabs are clean, the gill filaments are clear, and they are white or slightly yellowish brown. The gill filaments of stale crabs begin to rot and stick together, but this can only be observed after peeling off the carapace.

2. The following groups of people are not suitable for eating crabs:

1. Patients suffering from digestive tract diseases, such as diarrhea, stomach pain, chronic gastritis, duodenal ulcer, cholecystitis, gallstones, etc. Stone disease, etc.;

2. Patients with liver and kidney diseases, especially those in the active stage of hepatitis and liver and kidney dysfunction;

3. Gout patients;

4. Patients suffering from cardiovascular diseases such as hyperlipidemia and hypertension;

5. People with allergies, especially those allergic to seafood.