Officials say entrepreneurs may seek approval to establish fish farming in Michigan's Great Lakes waters.

It's an undertaking that hasn't taken place before on the U-S side of the lakes, although Canada has allowed commercial aquaculture in Lake Huron for decades.

Michigan's Department of Environmental Quality has heard from two operators interested in raising rainbow trout in netted enclosures.

One of them is Coldwater Fisheries of Coldwater, Ontario, which wants to invest $1.2 million in a farming and processing operation off Michigan's Upper Peninsula to produce up to 1.6 million kilograms of fish annually.