There is a reason why this author and radio personality is sometimes called 'Mark The Shark.' People are fascinated with sharks and their behavior. This video shot on a GoPro camera is from the dorsal fin of a hammerhead shark and the footage is completely insane! You'll feel like you're riding along.

The courageous videographer who shot this footage is cinematographer Andy Casagrande. He captured some incredible 4K footage that gives us a unique point-of-view from a great hammerhead shark as it swims along the ocean floor.

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