1. Originally, crayfish was used to treat environmental problems such as sewage in Japan, so it was difficult to accept compared with eating, and it was also used to treat corpses in a certain period of time.
2. Crayfish contains a lot of bacteria and parasites, but they are basically in the head.
3. Many unscrupulous merchants will use shrimp washing powder to clean crayfish, and the residual shrimp washing powder is quite harmful.
4, bitten by crayfish, it is easy to let people die of anaerobic infection.
5. Whether eating crayfish is poisoned is inconclusive. But crayfish are really in dirty water, and water with high heavy metals is easy to grow. There is no doubt about it.
6. Japanese people like to eat raw fish, and they have high hygiene requirements for fish, but they have no preference for crayfish.