Photo: World's Largest Catfish Species Threatened by Dam

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Children pose with a Mekong giant catfish caught at Khone Falls in Laos, near the border with Cambodia, in August 2007.

A dam planned on the Mekong River in Laos will threaten the migration of the critically endangered fish, according to Zeb Hogan, who heads the National Geographic Society's Megafishes Project.

Photograph by Suthep Kritsanavarin

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