Need to find a way to cross them with gills so they can handle the cold.
Benji, Tilapia are the oldest known farmed species. They have never even slightly acclimated to cooler waters, and hybridization of the most cold tolerant Blue Tilapia (42-45*) results in dying in warmer water of no lower than 52*. Dying annually is HOW the tilapia become a great management tool. If they lived year round, they would just become part of the overall pond biomass. In waters where they die, by consuming otherwise unusable nutrient in a pond, the tilapia convert those nutrients into a consumable food for all your year round fish. This lets you grow more, bigger fish in that same body of water that without tilapia, could not produce enough natural food to sustain the year round fish.