An endangered fish found in the Colorado River basin is on the upswing, federal officials said Tuesday as they proposed reclassifying the humpback chub as threatened.
The fish that gets its name from a fleshy bump behind its head is one of four endangered fish that make their home in the Colorado River and its tributaries. It was listed as such in the late 1960s as its numbers fell drastically before stabilizing more than a decade ago.
The largest population now is found at the Grand Canyon, with four, smaller wild populations upstream of Lake Powell in Utah and in Colorado canyons. The U.S. Fish and Wildlife Service said the fish is no longer at the brink of extinction and is better suited as threatened...