1. Crayfish live in ditches or ponds. It belongs to omnivores. In terms of eating habits, crayfish like to eat mud at the bottom of the river, and also like to eat dead small fish or other aquatic organisms.

2. The crayfish sold in the market are likely to be mixed with non-cultured lobsters. The living waters of these naturally living crayfish may be polluted, and they will carry all kinds of exogenous toxic substances. If these substances are not removed during cooking, it will pose a threat to health.

In addition, if expectant mothers are allergic to shrimps and crabs, they should not eat them. It is worth mentioning that mothers had better not eat crayfish, especially lactating mothers. Eating crayfish is easy to cause baby allergies. Moreover, there are many bacteria, germs and parasites in crayfish, and poor processing will do harm to health.