Deep-bodied, olive colored, with darker spots and flecks of red, and occasionally vertical bars along the sides. The hind end of the gill flap is black with a white border and has a red spot on the tip (hence its name). The chest color is yellowish to cream colored.The mouth is small and when closed barely reaches only to the front margin of the eye. The pectoral fins are long and more pointed than those of other sunfish; the first dorsal fin contains 10 sharp spines, followed by 10 to 12 rays. Found in a few ponds of southern Nevada and Lake Mead.