Female crabs have yolks, but male crabs do not.

The crab yolk is not the crab's egg, although the composition and the crab egg is basically the same, but there is a fundamental difference between the two. It is true that crab yolk contains egg cells that have not been discharged from the body, but there are other crab organs, glands, tissue fluid and other substances, not simply crab eggs. When the crab yolk becomes large and bright orange in color, the gonads of the female crab have matured, and what is produced and excluded from the body is the crab eggs, and the egg cells in the gonads are still part of the crab yolk.

The ovaries and digestive glands in the crab's body are orange in color and fresh in taste. Crab yolk is not the crab's eggs, although the composition and crab eggs are basically the same, but there is a fundamental difference between the two. It is true that crab yolk contains egg cells that have not been discharged from the body, but there are other crab organs, glands, tissue fluids and other substances, not simply crab eggs. When the crab yolk becomes large and bright orange in color, the gonads of the female crab have matured, and what is discharged from the body at this time is the crab eggs, while the egg cells in the gonads remain in the body and are still part of the crab yolk.

Crab yolk is rich in protein, phospholipids and other nutrients, and is nutritious, but also contains high levels of oil and cholesterol. Crab roe can be made into many delicacies: crab roe congee, crab roe tofu and so on. Shanghai Tang is also famous for its delicious snack - Crabmeat Xiao Long. As the name suggests, the main ingredient is crab roe. There are two kinds of crab roe: river crab roe and sea crab roe.

Crab: Animalia, Arthropoda, Crustacea, Mollusca, True Mollusca, Decapoda, Ventral Embryo suborder, Short-tailed Inferior Order. It is a crustacean whose body is protected by a hard shell and breathes by gills.

The number of genetic material of these organisms is complex and has a great deal of variability, often up to more than 100 pairs. Common crabs are hairy crabs (river crabs, hairy crabs, clear water crabs), pike crabs and so on. China's crab is very rich in resources, including the lower reaches of the Yangtze River, Gucheng Lake hairy crabs, Taihu Lake hairy crabs, Gaoyou Lake hairy crabs, Yangcheng Lake hairy crabs, Crab House hairy crabs, Xinghua hairy crabs, hairy crabs produced by Hongze Lake hairy crabs for the top quality.