August 20, 2019
Humpback chub are one of three species of chub that once inhabited the canyon, and are the only chub species still found in Grand Canyon. They have been protected under the ESA since 1967. (Photo/USFWS)
August 20, 2019
Humpback chub are one of three species of chub that once inhabited the canyon, and are the only chub species still found in Grand Canyon. They have been protected under the ESA since 1967. (Photo/USFWS)