The male crab has no crab yellow, only crab paste, which is white and translucent. The yellow substance in the male crab is the hepatopancreas of the male crab testis, which turns yellow after steaming or cooking. The crab roe in the female crab is composed of ovary, egg cells and part of digestive system, while the crab roe in the male crab is only part of digestive system and can also be eaten. Crab yellow in the shell of crab's back is rich in protein, fat, phospholipids, calcium and other minerals.

The male crab has no crab yellow, only crab paste, which is white and translucent. The yellow substance in the male crab is the hepatopancreas of the male crab testis, which turns yellow after steaming or cooking. The crab roe in the female crab is composed of ovary, egg cells and part of digestive system, while the crab roe in the male crab is only part of digestive system and can also be eaten. Crab's crab roe is rich in protein, fat, phospholipids, calcium and other minerals in the shell of crab's back. When cooked, it is orange, and the fatter the female crab roe is, the more it is.