Shillong: Meghalaya government on Thursday issued an order banning sale of fish brought in from outside the state for a period of 15 days after sample test of river water fishes shipments showed presence of formalin, an official said.
...Meghalaya bans fish from outside as tests reveal formalin presence
Formalin is a colourless solution of formaldehyde in water, used chiefly as a preservative for biological specimens. At least 30 of 42 samples collected from all districts had tested positive for formalin