May 4, 2019
This undated photo provided by the U.S. Fish and Wildlife Service shows a humpback chub in the Colorado River basin in Grand Canyon National Park in Arizona. (Travis Francis/U.S. Fish and Wildlife Service via AP)
May 4, 2019
This undated photo provided by the U.S. Fish and Wildlife Service shows a humpback chub in the Colorado River basin in Grand Canyon National Park in Arizona. (Travis Francis/U.S. Fish and Wildlife Service via AP)