A lake near me is stocked twice a year with Atlantic salmon. 5000 at a time 5-6 inches in size. Definitely a food reservoir experiment program going on here. A bunch of other species are stocked as well. Not gmo but it depends on where the state conservation department gets them. If they change to gmo fish they will have to start their research all over again. They have a lot of data but to suddenly change plans could screw up the whole lake ecology. I can’t see it happening.