The "razorback sucker", Xyrauchen texanus, is an endangered fresh water sucker of rivers in the Colorado River drainage of western North America.

The razorback sucker, also known as the "humpback sucker", is a species that can grow more than 600 mm (2 feet) in length, weigh more than 3 kg (6 pounds), and live 40+ years.

Examination of the stomach contents of adult razorback suckers from Lake Mohave indicate that the species is a benthic feeder (bottom of a sea, lake, or deep river), whose diet includes planktonic crustaceans, diatoms, filamentous algae, and detritus (fragments of decomposed plants or animals).