The Sharks of the Great White North are disappearing and no one knows why. This program explores the reasons for the declining population of shark species that inhabit the shores of North America. Blue Sharks Greenland Sharks Six Gill Sharks and Porbeagles are examined in their natural habitats using the latest underwater photography technology. These advanced devices capture never before seen footage and give unprecedented access to the frigid waters of the shark's habitat. Follow the world's leading researchers and see how they are frantically working against the clock to gather data on these magnificent animals.