River crabs generally have a lifespan of 1-3 years when they live in the river.

The river crab has only one reproductive cycle in its life. Once its reproduction ends, its life ends.

Therefore, the lifespan of a river crab is related to its sexual maturity. Mature river crabs usually reproduce and mate from December to March of the following year. Egg-bearing crabs breed and hatch from March to May. By June to July, river crabs are A large number of crabs died, so the life span of most river crabs is only two years. A few river crabs that mature in the second and third years die in the third and fourth years.