Bihar, India, September 2, 2026 — Authorities in India’s Bihar state have warned residents against buying, selling or eating unidentified and unusual-looking fish found in floodwaters flowing into the state from Nepal, citing concerns about possible contamination and reports of illness after some people consumed such fish.
The advisory was issued by the Fisheries Division of Bihar’s Department of Dairy, Fisheries and Animal Resources following reports of unfamiliar fish appearing in flood-affected areas, particularly in parts of West Champaran and Gopalganj along the Gandak basin. Floodwaters from Nepal have entered the Gandak river system and inundated areas of northern Bihar.
The department said flooding can displace fish from rivers, ponds, lakes and other water bodies and carry them into unfamiliar areas. During this movement, fish may come into contact with sewage, dead animals, mud and other pollutants, creating a risk of contamination by bacteria, viruses, fungi or chemicals.
Residents have been advised not to consume fish whose species or origin cannot be established. The department has also asked people to avoid buying or selling such fish until their safety is verified by the relevant authorities.
People who develop symptoms such as vomiting, diarrhoea, abdominal pain, dizziness or difficulty breathing after eating fish from floodwaters have been advised to seek immediate medical attention at the nearest health centre or hospital. Residents have also been asked to report unfamiliar fish to their district fisheries officer or local administration.
