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In the dazzling Live Stream trailer for the upcoming documentary Sharkwater Extinction, ocean conservationist and award-winning director Rob Stewart is doing what he loves the most in the world —swimming with sharks. While floating alongside a Great Hammerhead, Rob gives us a sneak peek into the shocking next chapter of the Sharkwater story and one of the groundbreaking ways he'll be filming it — live on an iPhone with a HITCASE.