Crayfish are cultured all over the world, and form a large number of wild populations. China was introduced from Japan in 193s and 194s, and Japan was introduced from the United States earlier, mainly used as food and pets.

crayfish are often mixed in crops (such as rice) fields. There is no need for artificial incubation. Once the original seed is put into the pond, it can achieve self-maintenance. After harvesting, it is not necessary to put the original seed again. Escaped individuals dug holes in the dam to survive. They can survive in temporary water bodies, and they have a wide range of feeding habits, and the speed of establishing populations is extremely fast and easy to spread.

It is extremely threatening to local fish, crustaceans and aquatic plants, destroying the local food chain; Because it feeds on roots, it directly damages crops (especially aquatic and semi-aquatic crops such as rice) and natural vegetation; Cave-building causes the loss of irrigation water and the destruction of fields; Because of the miscellaneous feeding habits of crayfish, it has a certain influence on the development of fry and the cultivation of the first-year-old fish, and it is harmful to the artificially bred young mussels.

because of its strong adaptability, strong resistance, wide feeding habits and fast population proliferation, crayfish often cut crops, especially rice crops, and may compete with local crayfish species.

Habitat

Habitats in permanent streams and swamps and temporary habitats, including ditches and ponds. They are usually mixed with plants or wood chips in streams, which will destroy and weaken the banks. In areas where floods recede, they can be found in simple caves. Living in wetlands, lakes and rivers with shallow water bodies and abundant aquatic plants.

This species is found in a wide range of habitat types, including wetland meadows, underground karst systems, seasonal swamps and marshes, permanent lakes and streams, paddy fields, irrigation channels and reservoirs. This species can tolerate a series of environmental conditions including low oxygen level and high temperature.