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River Shark!

Are bull sharks stalking America's suburban waters? Nicknamed the 'linebackers of the sea' for their wide, stalky bodies, bull sharks are rumored to be moving inland, even surviving in freshwater 2,000 miles upriver. To separate fact from fiction, Zeb Hogan is teaming up with some of Florida's leading shark experts on a quest to catch a 'river shark' and to determine the truth behind their deadly reputation.