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