At first sight, it looked as if the reason was that the chub were being eaten by trout introduced for sport fishing in the mid-20th century.

ECONOMIST: Flooding the Grand Canyon

The chub were well adapted to the poor visibility created by the thick, red water which gave the river its name, and depended on it to hide from predators.

ECONOMIST: Flooding the Grand Canyon

Without the cloudy water the chub became vulnerable.

ECONOMIST: Flooding the Grand Canyon

And the chub are not alone.

ECONOMIST: Flooding the Grand Canyon

The humpback chub, for example, thrived in the rust-red waters of the Colorado.

ECONOMIST: Flooding the Grand Canyon

On Montgomery Lake, an oxbow of the Ocmulgee River near Helena, Perry threw out a wooden plug called the Creek Chub Wiggle Fish and reeled in 22 pounds and 4 ounces of fishing immortality.

FORBES: The $8 Million Fish

But trout and chub co-existed until the Glen Canyon dam was built, so something else is going on.

ECONOMIST: Flooding the Grand Canyon

The lake's owner, the Nature Conservancy, asks that they not: The ecosystem is home to the endangered 2-inch Borax Lake chub, which exists only here.

FORBES: A Desert Where?

Fear of the foreign fish has even prompted an official government initiative to eradicate the bass over worries that the species will eat and eventually wipe out the nation's beloved ayu, chub and crucian carp.

FORBES: Long Reach Of The Largemouth

The team found 32 specimens, including carp, eels, chub and roach, alive in that area.

BBC: NEWS | UK | England | London | Toxic spill in river kills fish

Bitch made Iggy Pop look chub, and every summer she caused a serious commotion at the pool.

NEWYORKER: Miss Lora