It is a juvenile, male Longear Sunfish (Lepomis megalotis). When breeding, the belly will change from yellow, to bright orange. They are striking fish (and delicious). They can get up to 12" and near 1 pound. Like most sunfish, they are veritable demons on light tackle. The Ocoee is full of them. They are probably the second most numerous fish there, after bluegills. Third Place would go to Shellcrackers.