Bihar tells districts not to eat or sell unknown fish riding Nepal floodwater

Bihar's Department of Dairy, Animal and Fisheries Resources has told people not to eat, buy or sell unfamiliar fish swept into the state by floodwater from Nepal. The advisory went out after reports of illness in some households and after videos of large, odd-looking catfish spread from West Champaran, Gopalganj, Bagaha and Saran.

The order is blunt. Do not treat a fish as safe because it looks a little like a species sold in the local market. Do not trade fish taken from floodwater until the district fisheries officer has named the species. Anyone who vomits, has diarrhoea, stomach pain, dizziness or trouble breathing after a meal should go to the nearest health centre and tell the staff what was eaten.

What the fish probably are

Sameer Kumar Sinha, director at the Wildlife Trust of India, said the animals turning up in the Gandak after the Nepal floods are believed to be goonch catfish, Bagarius bagarius, known locally as Gochita. They are a known river fish in the Himalayan system, not an alien species dropped from the sky. They can grow large. They also spoil fast once they die in warm, dirty floodwater. That spoilage, and the pathogens that travel with flood silt, is the health risk the department is naming, not a claim that the species is poisonous by nature.

Fishermen in Gopalganj and Bagaha have described catches that look, in their words, almost dolphin-like in bulk. Those descriptions match a big sisorid catfish better than a mystery import. Identification still has to be done case by case. The advisory applies to any unidentified fish, not only goonch.

Why floodwater changes the risk

The Nepal flash floods that killed more than 1,100 people also pushed an unusual pulse of water down the Gandak, the Ganga and the Kosi. Dead fish, sewage, soil and farm chemicals move with that pulse. A fish that is safe when taken live from a clean stretch of river is a different product after it has sat in a flooded field.

The department asked residents who see unusual fish to call the district fisheries officer rather than put the animal in a pan or on a stall. That is a surveillance request as much as a food-safety request. If goonch or another upland species is now common on the Bihar floodplain, the fisheries wing wants a record before the water drops.

What happens next

The advisory holds until the department says conditions are normal again. There is no published date for that. Clinics in the Gandak districts should expect gastrointestinal cases and should ask about fish. Markets should expect inspections. Households that rely on floodplain fishing for protein will feel the ban as a cost. The alternative the state is offering is a named, checked fish, not an empty net forever.