Chrosomus erythrogaster can be distinguished by having the following characters: 67-95 scales on lateral line; pharyngeal teeth 0,5-5,0; moderately pointed snout, longer than eye in adult; small, moderately oblique (less than 45°), slightly subterminal mouth ending in front eye; 2 black stripes along side with upper one thin broken into spots at rear while lower one wide, becoming thin on caudal peduncle; olive brown above, dusky stripe along back; black spots (sometimes absent) on upper side, often arranged in row; silver yellow side; black wedge-shaped caudal spot; white, yellow or red below; and large males with vivid color, consisting of bright red belly, lower head and base of dorsal fin, and yellow fins (Ref. 86798).