Why did 13,000 kilograms of fish in the fish pond die mysteriously overnight?

He was poisoned and killed.

Mr. Xu from Fuyang, Hangzhou called us and said that he is a big fish farmer, but just a few days ago, all 13,000 kilograms of fish in his fish pond died mysteriously overnight, and the loss exceeded 200,000 yuan. He suspected that the death of the fish was not accidental but was caused by deliberate poisoning.

Mr. Xu lives in Jiangbin Village, Lushan Street, Fuyang District, Hangzhou City. He is a well-known fish farmer. At 6:30 in the morning on the 6th, he checked the fish pond as usual and found that the fish were very abnormal and there was a strange smell in the air. Mr. Xu immediately started to rescue the fish and caught more than 13,000 kilograms of fish that day.

Mr. Xu has been raising fish for 22 years, but has never seen this phenomenon. He hurriedly checked the fish he caught and found that even the wild eels in the fish pond, which had always been tenacious, could not escape their bad luck. Mr. Xu realized that the fish might have been poisoned.

Mr. Xu’s fish pond has a variety of farmed fish such as grass carp and catfish. The largest bald fish already weighs seven or eight pounds. It is a good time to harvest. But how could a perfectly good fish be suddenly poisoned? Mr. Xu walked around the fish pond looking for clues. On the dam to the east of the fish pond, a bottle cap caught his attention. This bottle cap was a pesticide bottle cap.

It was then that Mr. Xu suddenly discovered that the peculiar smell in the air was the smell of pesticides, and it was coming from the fish pond. He suspected that someone might have put pesticides into the fish pond, causing the nearby fish to die quickly. Thinking of this, Mr. Xu quickly called the police, who rushed to the scene to take samples and test the water quality. According to Mr. Xu, after water quality inspection, the police determined that pesticides had been put into the fish pond.

According to Mr. Xu’s judgment, a bottle of pesticide is 200 ml, and this fish pond has been put into at least 2,000 ml of pesticide. After discovering that the fish was poisoned, Mr. Xu immediately brought in fresh water and removed the fish that had not yet been poisoned. But later it was discovered that under this concentration of pesticide contamination, rescue had no effect at all. The fish still in the fish pond are already dying, and dead fish float up every day. Seeing that there will be no fish left in this 12-acre fish pond, Mr. Xu is heartbroken.

Twenty-five thousand kilograms of well-grown fish were poisoned and died one after another. According to Mr. Xu’s estimate, he lost at least 200,000 yuan. If he wants to continue using this fish pond, he will need to fish out all the fish, clean the fish pond, dry and disinfect it, which will take at least half a year. Mr. Xu's family's livelihood depends on the fish pond, and he doesn't know what to do in the future.

The fish that were supposed to be fresh and plump were now piled up beside the fish pond, emitting a stench. The village committee and surrounding fish farmers are also helping Mr. Xu transport the dead fish out or landfill them. Seeing what happened to Mr. Xu, other fish farmers were heartbroken, and at the same time they couldn't help but worry about their own fish ponds.

So, who put highly toxic pesticides into Mr. Xu’s fish pond, and why? It is understood that the police are currently investigating various clues based on the information provided by Mr. Xu. However, due to the need to solve the case, it is not convenient to release specific information about the case to the public.