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In the depths of the Nicaraguan rainforest, Dr. Zeb Hogan is on a journey to find a powerful predator the giant tarpon. These 300-pound beasts lurk the murky lakes and secluded jungle rivers of Central America. In the rivers of Nicaragua, tarpon are a top predator. It can take up to eight hours for expert fishermen to reel one in, Zeb will face one of his most difficult battles in the hunt for the one of the biggest monsters of them all.