1, stomach-removing: located in the first half of the crab shell, with mud in it, where bacteria grow and multiply. Crab stomach is commonly known as "crab monk", that is, the triangular bone bag in the center of the front edge of the back shell contains dirty sand.
2, in addition to the intestines: located in the middle of the crab navel, showing a black line.
3, except crab heart: located in the middle of crab yellow. Crab heart is extremely cold and hexagonal, also called "hexagonal meat". It is in the center of the crab, under a black film coat, and can be picked out with crab toes when eating.
4, in addition to gills: there are two rows of soft things like eyebrows in the abdomen of crabs, also known as "crab blindness", on both sides of the crab body, with more pathogenic bacteria and dirt.