Gila alvordensis Hubbs & Miller, 1972 The Alvord chub (Siphateles alvordensis) is a rare cyprinid fish endemic to the Alvord basin in southeastern Oregon and northwestern Nevada, U.S., known only from a few springs, streams and marshes in the Sheldon National Wildlife Refuge, and one location elsewhere.

The Alvord chub is a small fish, with adults ranging up to 5.5 inches (14 cm) in length, but with many half that size.

Studies of the fish's diet shows it is an opportunistic feeder, consuming a variety of aquatic invertebrates, with a considerable percentage of midge larvae.

Although apparently doing well in its location, the species is considered vulnerable because of its very limited range in a fragile environment.

Having evolved without any competition, there is concern over the possible effects of exotic fish introduction, whether deliberate or accidental.