Orca whales make deep dives under ice to hunt Antarctic cod in McMurdo Sound, Antarctica

Orca whales make deep dives under ice to hunt Antarctic cod in McMurdo Sound, Antarctica

Norbert Wu/Corbis ©

Orca whales make deep dives under ice to hunt Antarctic cod in McMurdo Sound, Antarctica

Orca whales make deep dives under ice to hunt Antarctic cod in McMurdo Sound, Antarctica

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