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Catfish King

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Aquatic ecologist Zeb Hogan shows off a 6-foot-5-inch Wels catfish caught in the Ebro river. This monster fish, capable of swallowing a human whole, is one of several invasive catfish species that are taking over the rivers of Spain.

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Hogan travels to Spain in search of the invasive wels catfish - a monster fish with a voracious appetite capable of destroying the local ecosystem.

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