Photo: Asian Catfish Migrates Hundreds of Miles, Rivals Salmon

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Three recently caught Mekong catfish lie in a fishing boat.

A new study suggests that the Southeast Asian catfish behaves like a salmon, traveling more than 600 miles (1,000 kilometers) from the ocean to the river to spawn.

But conservationists warn that the species could be at risk due to a planned dam on the Mekong that might block its migration.

Photograph by Zeb Hogan

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