Narwhals Threatened by Global Warming

The whales, known as the "unicorns of the sea," live in Arctic waters.
3:00 | 08/21/12

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Transcript for Narwhals Threatened by Global Warming
have you seen these dramatic pictures? They are images, from massive satellites, that show a huge piece of frozen earth in greenland on july 8th and four days later, gone. It has thawed. Tonight, we're going to take you to a rare trip to that region, the melting ice to find a truly mysterious creature the one that inspired tales of the unicorn. The kind of tale that needs human help. Linsey davis went to find them in the arctic. Reporter: I'm traveling to one of the most inhospitable places in the world the middle of nowhere baffin island deep inside the arctic circle. We're into our third hour of getting pulled by a snowmobile not another human being in sight. Are we lost? Reporter: This is the price of admission for a shot at seeing one of the most elusive creatures on the planet the narwhal. The naro. The so called unicorn of the ocean with that single tusk that can be up to 10 feet long it's rumored to live to 90, it's the stuff of fantasy. The problem is the arctic see ice is melting faster than any other. S exposing the narwhal to predators. The ice is disappearing beneath our feet. Welcome to the edge of the world, right? Reporter: Tom lennartz is out fearless team leader from arctic kingdom polar expeditions. We travel to the edge of the ice and then, arch back in distance. Suddenly we hear a massive gasp of air. They're all around us now. Just as quickly as they appear, they're gone. They're among the most elite creatures on the planet and why scientists say they disappear before we ever get a chance to know them. Linsey davis, abc news, baffin

This transcript has been automatically generated and may not be 100% accurate.

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