Before cleaning crayfish, it needs to be soaked in salt water, vinegar water or wine for more than two hours, which can remove parasites on the surface of crayfish and reduce surface dirt. The growing environment of crayfish is not very clean. It has a lot of black dirt on its body and also carries more parasites and eggs.

Crayfish is also called Procambarus clarkii, red crayfish and freshwater crayfish. Shaped like a shrimp with a hard shell The adult is about 5.6 to 1 1.9 cm long, dark red, with a nearly black shell and wedge-shaped stripes on the ventral back.