Rio Grande Chub (Gila pandora) is a small (15 cm) fish that currently occurs in the Pecos River system, the Red River drainage in New Mexico, and in tributaries of the Rio Grande (it has been extirpated from the mainstem of the Rio Grande). They inhabit flowing pools with cover from vegetation and undercut banks in small to moderate sized rivers and creeks; they can also be found in reservoirs and lakes. The main threats to this species are stream dewatering, channelization, and non-native fishes.