Crabs like to eat dead fish, dead shrimp and other rotten animal carcasses, and they will be infected with certain bacteria.

Live crabs can excrete bacteria through metabolism in the body; Once the crab dies, the bacteria in the body will multiply, decompose the crab meat and produce toxins.

If people eat these dead crabs, it will cause food poisoning. The common manifestations are nausea, vomiting, abdominal pain and diarrhea. In severe cases, dehydration, electrolyte disorder, convulsion, even shock, coma and septicemia may occur.