You have to shell four or five times in your life. Many people know that authentic Yangcheng Lake hairy crabs shed their shells, but how many times do they shed their shells in a short life? Although there are differences in different regions, the following laws can be summarized in general.

1, the larvae of Eriocheir sinensis molted for 5 times and then metamorphosed into megalopa, and the megalopa molted 1 times and became 1 stage larvae.

2. After the gonads of hairy crabs develop to a certain extent, they enter the reproductive molting before reproduction. This molting is the last molting of Yangcheng Lake hairy crabs.

3. The growth and molting age of hairy crabs are closely related to nutrition, water temperature and water quality. In the first year of the Yangtze River basin, the living environment was not conducive to growth, and hairy crabs propagated and molted early, forming small blue crabs. In the second year, if there is overnutrition in the growing period, hairy crabs will enter reproductive molting earlier than normal, and the commodity specifications are small.

In the Yangtze River basin, if the nutritional conditions are poor, hairy crabs will be extended to mature in the third year. In the adult stage, if the high temperature lasts for a long time in summer, the hairy crabs will only shed their shells four times, and then they will start to breed and migrate. In the northern alpine region, the reproductive molting of hairy crabs is postponed until the autumn of the third year, and there will be a few hairy crabs in the fourth year.