Very colorful. Light to dark blue on bright purple. In breeding season, the breast of males is red. Gill covers often blue with a black spot on the rear of the "ear flap." Faint vertical bard on the sides. Dorsal fin has 10 spines followed without interruption by 10 or 12 rays. The mouth is small and when closed, barely reaches the front of the eye. Body deep for its length and compressed from side to side. Found in small farm ponds throughout northwestern and southern Nevada.