A thick-bodied sunfish with a large mouth for sunfishes; the upper jaw extends to about the middle of the eye when the mouth is closed. The spiny dorsal fin has 10 spines and is broadly connected to the soft dorsal fin. The pectoral fins are short and rounded, and the ear flap is never elongated. The back and sides are bluish-green with emerald and yellow reflections, while the belly is white or light yellow. Sometimes there are several black vertical bars on the sides. The sides of the head are mottled with emerald and yellow streaks, and the black ear flap has a whitish or yellowish margin. Green Sunfish usually have whitish or yellow-orange leading edges on their dorsal, anal and caudal fins.