Seven-star crab is not poisonous. Seven-star crab generally refers to seven-star crab, jinan cuisine. The crab meat is delicious and beautiful in shape. Seven crabs are placed on the plate, hence the name Seven-Star Crab. Edible crabs have some parts that are not poisonous, but they can't be eaten, such as crab stomach, crab heart, crab intestines and crab gills.

1. Crab's stomach: The crab's stomach is its digestive organ. Because of its miscellaneous eating habits, its food is messy, and it also has the habit of eating rot, so its stomach is not clean and can't be eaten. The stomach is located on the crab cover, and there will be crab yellow on the surface, so it must be separated.

2. Crab heart: After the crab cover is lifted, there is a black film inside, and the hexagonal thing under the black film is its heart, which is also inedible. Clean it up.

3. Crab intestine: Like other animals' intestines, the crab intestine is full of excrement. It connects the crab stomach and is a black line, which is easy to find.

4. Crab gills: Crabs live in water, so they breathe through gills. Because the water needs to be filtered, this part is dirty and tastes bad, so don't eat it. Crab gills are mainly in its abdomen, and they are two rows of soft things, which are easy to distinguish.