sierraclub.org - sierra magazine - sept/oct 2011 - endangered-species - on the brink: animals fighting for survival
Photography by Joel Sartore | Captions by Della Watson
The yellowfin madtom is a type of small catfish native to the Tennessee River Valley, and today it can be found in only a handful of streams. Water pollution and habitat disruption have reduced the fish's population to approximately 8,300 individuals, 800 of which live in captivity. (Photographed at Conservation Fisheries Inc., Knoxville, Tennessee)
Get the Sierra Club Insider
Get the Sierra Club
Insider, our email newsletter. News, green lifestyle tips, and ways to take action: right to your inbox, twice a month.