The protest resulted in a scarcity of fish across the coastal state, said officials.
Officials said that FDA teams first raided and sealed operations at the Margao wholesale fish market and seized 17 trucks carrying fish.
The FDA action at Margao market was after a preliminary "on the spot" analysis of fish showed the presence of formalin or formaldehyde, said officials.
The move, however, upset fish vendors who asked their counterparts in other fish markets, including those at Mapusa and Panaji, to stop operations as a mark of protest.
The situation eased, said officials, after the FDA certified that the formalin content in the fish was within permissible limits and that it was safe for consumption.
While today's business, generally conducted in the early hours of the morning, got stalled due to the protest, fish markets are expected to remain open tomorrow, they added.
"The South Goa team visited the wholesale fish market at Margao and collected samples of fish, mainly from the vehicles arriving from states such as Kerala, Tamil Nadu, Odisha, Andhra Pradesh and Karnataka," she said.
"These samples showed the presence of formaldehyde. Hence, as a precautionary move, we instructed fish vendors to not distribute it till detailed laboratory reports were available," she informed.
"The results showed that the the presence of formalin was within permissible limits. The fish is safe for consumption," she added.
The FDA Director added that fish tested from Panaji market in North Goa also showed the same results and were then declared fit for consumption.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)