humpback chub

National Park Service officials are working to eliminate a spawning ground for harmful nonnative fish in Glen Canyon.

The U.S. Bureau of Reclamation has begun water releases from Glen Canyon Dam to cool the temperature of the Colorado River and slow the reproduction of an unwanted fish threatening native species.

The U.S. Bureau of Reclamation is taking public comment on a proposal to disrupt the spawning of a nonnative fish in the Grand Canyon by releasing spikes of cool water from Glen Canyon Dam. Many in the Colorado River community want more options.

The U.S. Bureau of Reclamation released a draft plan Wednesday responding to the invasion of nonnative, predatory fish in the Colorado River below Glen Canyon Dam.

Federal officials say they’re one step closer to finalizing a plan to remove invasive fish from the Colorado River below Glen Canyon Dam.

This weekend federal officials will begin another round of chemical treatments in the Colorado River meant to remove invasive fish. But environmentalists want more to be done to protect native species.

The National Park Service will renew efforts to rid an area of the Colorado River of invasive fish by killing them with a chemical treatment.

Environmental groups are calling on federal officials to prevent populations of non-native smallmouth bass from establishing below Glen Canyon Dam on the Colorado River.

The U.S. Bureau of Reclamation is seeking public input on a plan to prevent smallmouth bass from spawning downstream of Glen Canyon Dam.

As America's large reservoirs on the Colorado River drop to record-low levels, fish are among those suffering the impact.