A solitary killer whale, or orca, has been filmed hunting and killing a great white shark in an "astonishing" attack. Scientists said it was "unprecedented" and showed the exceptional predatory ...

Killer whales are apex predators ... They primarily eat seals but also hunt belugas, narwhals, whales, walrus, and occasionally fish. Leopard Seal – As one of Antarctic’s most ferocious ...

The animals that could join the list are killer whales, hippos, walruses, narwhals, and sperm whales. The creatures are hunted and killed for their ivory which is often used in decorative carvings.