The Colorado pikeminnow (formerly squawfish) Ptychocheilus lucius is the largest cyprinid fish of North America and one of the largest in the world, with reports of individuals up to 6 ft (1.8 m) long and weighing over 100 pounds (45 kg). Native to the Colorado River basin of the southwestern United States, it was formerly an important food fish for both Native Americans and European settlers. Once abundant and widespread in the basin, its numbers and range have declined to the point where it was listed as endangered in 1967, a fate shared by the three other large Colorado basin endemic fish species: bonytail chub, humpback chub, and razorback sucker. The Colorado pikeminnow is currently listed as vulnerable by the IUCN.