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Weddell Seal in Antarctic Water

Weddell seals grind their teeth on holes in the ice to keep them open to their comings and goings between ocean and air.
(© John Weller)
Weddell seals grind their teeth on holes in the ice to keep them open to their comings and goings between ocean and air. Their dives can last over an hour when they are looking for an opening in the ice and go to depths of 600 meters (almost 2000 feet) when they are looking for their next meal of Antarctic toothfish.