Video: Giant Fish Faces Big Trouble in China

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September 11, 2007—One of the world's largest freshwater fishes is facing big trouble in its native waters.

The Chinese sturgeon, which can weigh nearly half a ton and grow 16 feet (5 meters) long, is threatened with extinction in China's Yangtze River, where only a thousand are thought to survive. Among the gravest threats to the ancient fish are huge new dams being built on the river, including the world's largest hydroelectric plant, the Three Gorges Dam.

Join biologist Zeb Hogan of the National Geographic Society's Megafishes Project as he explores the threats facing the giant sturgeon and the efforts underway to save it.

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