the country of origin is Louisiana in the southern United States.
the harm is that 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. Extremely threatening 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.