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US formally removes Colorado River fish's endangered status

Travis Francis/U.S. Fish and Wildlife Service via AP, File

The U.S. Fish and Wildlife Service has reclassified a rare Colorado River Basin fish called the humpback chub from endangered to threatened status after a decades-old effort to stabilize its populations.



The fish with a fleshy bump behind its head is one of about a dozen that are native to the Colorado River system and four that are currently endangered. Federal officials say the numbers have stabilized but the fish needs continued protections in the Grand Canyon and parts of Utah and Colorado. It once had a broader range in the Colorado River Basin, but dam construction and the introduction of non-native predator species led to local populations becoming extinct.

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