Stock Photo - Adult female leopard seal Hydrurga leptonyx with Lindblad Expedition guests at Brown Bluff near the Antarctic Peninsula, Southern Ocean MORE INFO The leopard seal is the second largest species of seal in the Antarctic after the Southern Elephant Seal, and is near the top of the Antarctic food chain It can live twenty-six years, possibly more Orcas are the only natural predators of leopard seals In 2003, a leopard seal dragged a snorkeling biologist underwater to her death in what was identified as the first known human fatality from a leopard seal However, numerous examples of aggressive behavior, stalking, and attacks on humans had been previously documented The leopard seal has also been known to snap at people´s feet through holes in the ice