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known as the Arctic Unicorn because of their strange spiral tusks.
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Normal are some of them are secretive and elusive animals in the world's oceans.
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The leads provide passage for thousands of these mysterious ways.
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Each summer, they travel 1000 kilometers north, navigating through the ice to reach rich fishing grounds.
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More whales travel along the edge of the ice, where it meets the open sea to search for the openings of leads.
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It's a hazardous journey.
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As mammals, they need air to breathe, and if the ice closes above them, they could suffocate.
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They're looking for holes in the ice where they can surface.
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A single breath will last them for 15 minutes.
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The further they travel, the harder it becomes to find holes in the ice, the statue of breath and then travel on but ahead.
