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a scientific American 60 second science. I'm Julia Rosen.

Oh, my buddy. Hope you find your dad.

Thanks, Mr. Narwall.

In real life, Narwalls don't speak English,

like the one bidding farewell to Will Farrell's character in the movie Elf.

Instead, they sound more like this.

That's an audio clip recorded by scientists last summer under the icy waters of Northwest Greenland.

If we want to describe what animals are doing, we first better understand what sounds are telling us.

Yevgeny Podolsky, a geophysicist at Hokkaido University in Japan.

Podolsky and his colleagues study the soundscape of glacial fjords.

There are noisy places where icebergs crash into the ocean and air bubbles fizz out of melting ice.

These fjords are also home to Narwalls. The animals are sometimes called

Unicorns of the Sea because of their single long spiraled tusk and they're shy which makes them hard to study.

So Podolsky teamed up with local Inuit hunters who snuck up on narwhals in kayaks and captured audio.

That's the sound of a NARwall looking for food using echolocation, like a dolphin or a bat.

And that's a N our wall closing in on its prey, which it vacuums up into its toothless mouth. So it starts sounding like, to my ear like a chainsaw or something like so it's so many little clicks

that we cannot even distinguish them and this is recognized as foraging related sound used also by other animals, for example,

other dolphinoids or bats, they do the same trick because when they approach the target their prey which is for

Narvo's Arctic Court or Greenland Holly, but they want to update their knowledge about the position of the target more frequently

...