BUFFALO NARROWS, Sask. — A Saskatchewan man has been fined almost $20,000 for the illegal sale of fish.

Leon Morin pleaded guilty in Buffalo Narrows provincial court to four charges under the Saskatchewan Fisheries Act and Regulations.

The Environment Ministry says Morin unlawfully marketed fish caught for both commercial and subsistence purposes.

Officials investigated after reports in 2012 about large-scale abuse of walleye stocks in the Buffalo Narrows area.

Morin was charged after he sold undercover officers fish after the commercial season had ended.

Fish may be purchased from a licensed commercial fisher or dealer, but vendors must provide a receipt that includes the seller's contact information and where the fish was caught.