 Adults are sexually dimorphic, although both sexes are darker on top with a lighter belly.Juveniles and adult females are similar in appearance, with a body that is grayish-green to olive green in color, lacking a dorsal ocellus, and generally without vertical bars, although females may sometimes have sidebars (usually faint).Mature adult females may also have a visible sheath of tissue along the front of the anal fin, which is believed to function as an oviduct.