Crayfish can eat! The key is to buy crayfish in the regular market first. It is required to choose crayfish with bright colors, large individuals and a consistent proportion of head and trunk size. Never choose a small black one! Second, use a brush to clean its abdomen! Third, go to the head and pull the intestines, leaving only the shrimp! It is suggested to cook with a big flavor to cover the fishy smell of crayfish! The fourth is to eat crayfish and don't overdo it! It is easy to cause gastrointestinal discomfort or allergic symptoms, and allergic symptoms are generally manifested as red spots and itchy skin.