The Little Colorado sucker has a fusiform, chubby body and is harshly two-toned, with dark gray-black topside and whitish-yellow underside (both in adults and juvenile fish).
[1] The fish has a thick, deep caudal peduncle (tailside), a large head and an enlarged mouth, with small lower lips.
Little Colorado suckers are usually found in pools with a great amount of cover and shade; also predominant in riffles (a patch of waves).
These fish tend to stay in small to medium rivers, or even in smaller bodies of water, such as creeks.
The Little Colorado sucker usually feeds late in the evening and early in the morning, and spends its time stirring areas of gravel and sand looking for food.