Almost 70 percent of Michigan voters do not want the state to allow fish farms on the Great Lakes, according to a poll done by Epic MRA.
Senator Rick Jones of Grand Ledge is one of the biggest opponents of fish farming.
He says one farm produces as much waste as a city of 65,000 people.
He's introduced a bill requiring them to treat their water before allowing any of it to get into Michigan's waterways.
"The fishing industry in all of the Great Lakes put together produces seven billion dollars. Why would we want to endanger that?" Jones said.
"Thousands of jobs are at risk here for a greedy corporation that wants to have cheaper fish to sell to restaurants."
Conservation groups are also worried about fish escaping from farms and spreading disease or breeding with wild fish.
