A slender, fine-scaled sucker with a short dorsal fin. The scales are largest near the tail fin, becoming smaller toward the head. The lips are covered with small bumps. The back and sides are greenish with a brassy or silvery luster; the belly is white. This coloration makes it almost invisible when resting on a gravel stream bed. The dorsal and tail fins are dusky or clear; the lower fins are white, often tinged with yellow or orange.