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The oceans of our planet are ruthless battlefields that constantly test even the deadliest carnivores. Dive beneath the icy waves of Alaska's Aleutian Islands to witness a hunting technique rarely, if ever, documented amongst killer whales. Orcas spend only moments feeding on a gray whale calf before dragging the carcass to the sea floor in order to store the meat for leaner times. Remarkably, small cameras mounted on the dead whale capture the entire process.