Masterful traps set by humpback whales in the straits of Alaska. An ingenious partnership between dolphins and gannets by Bird Island, South Africa. A killing school where orcas teach their young to hunt sea lions on the shores of Punta Norte. For ages, the oceans have hidden the true depth and breadth of their hunters' inventiveness. But now, wildlife photographers below and above the water's surface are capturing images that show off their remarkable prowess. Discover their secrets as we travel the world to see the ocean's predators at work.