Crab yolk is a collection of ovaries and digestive glands in the body of a female crab. Crab yolk is orange in color and delicious in taste, and it contains high content of oil and cholesterol. Crab roe can be made into many delicacies, such as crab roe porridge and crab roe steamed buns. There are two kinds of crab roe: river crab roe and sea crab roe.

According to "Food Classic": female pike crabs have the effect of appetizing and moistening the lungs, tonifying the kidney, strengthening the yang, nourishing the blood and activating the blood. Among them, crab yolk has the highest nutritional value. It is rich in trace elements, collagen, calcium, phosphorus and other essential nutrients, "gold in the sea".

In the wild environment, in the ninth month of the lunar calendar, the crab yolk of female crabs grows the most abundant; in October, the crab paste (crab oil) of male crabs grows the most thick. Therefore, in the past to eat crabs, there are "nine female and ten male" said. Meaning: the lunar calendar in September to eat female crabs, the lunar calendar in October to eat male crabs.