ALBUQUERQUE, N.M. (AP) — Environmentalists are asking federal wildlife managers to used the Endangered Species Act to protect a fish found only in the Rio Grande in Texas and the Pecos River in New Mexico.

WildEarth Guardians filed the petition with the U.S. Fish and Wildlife Service on Tuesday, saying it is part of a campaign focused on vulnerable species found in rivers and streams across the West.

The group contends the Rio Grande shiner is one of the aquatic and riparian species that will not survive into the next century without a significant change in the way rivers are managed.