It can be divided into five stages: larva, big eye, young crab, crab species (young crab) and adult crab. Larvae grow and develop in seawater, and after molting for five times, they become big-eyed larvae. The young crab with big eyes began to live in fresh water, and after 5 to 7 days 1 time, it became the first young crab. Every once in a while, after molting 1 time, the individual keeps growing, and the body shape gradually changes from round to nearly square. With the growth of the individual, the head breastplate gradually becomes wider. Generally, in the third juvenile crab stage, the length of the head breastplate shell is greater than the width of the head breastplate. The third kind of juvenile crab is called juvenile crab, and the juvenile crab stage is divided into bean crab and buckle crab, which is called crab seed stage in production.

In the crab breeding stage, the abdominal periphery of the female crab and the large claw hair of the male crab are very short and rare. The shell of crab species is yellowish or grayish yellow before it matures and molts, which fishermen usually call "yellow crab". The gonad of "Yellow Crab" is always in the first stage to the second stage.