After preliminary tests conducted by four major institutes revealed heavy traces of formaldehyde in fish bought from outside the state, the department said a detailedtestregarding the presence of harmful chemicals in fish sold across the state is the need of the hour .
The samples for the tests were collected from only a few districts, including Nagaon and Kamrup (M). The department will takelegalaction against sellers found selling or storing such fish. The guilty will face up to five years in prison, as per report.