The main reason why the fish in the reservoir can't be eaten is that it is easy to breed parasites. Dead fish, Monopterus albus and polluted reservoir fish are all at risk of parasites. Dead fish will breed bacteria after eating, causing gastrointestinal diseases and poisoning. Monopterus albus is a common parasitic fish, and incomplete heating of Monopterus albus will lead to human infection with parasites. The polluted fish in the reservoir itself is very polluted and easy to breed parasites.