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Why Beluga Whales are the Canaries of the Sea

Learn more about why beluga whales don't have dorsal fins and why they have extra neck vertebrae.

Avery Hurt
ByAvery Hurt
Credit: Dotted Yeti/Shutterstock

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Beluga whales are the only whales, other than narwhals, a closely related species, that live exclusively in arctic and subarctic waters. Like many other arctic animals, belugas are white. In fact, the word ‘beluga’ comes from ‘bielo,’ the Russian word for white.

But belugas aren’t born white, notes Ragen Davey, Alaska marine representative for the conservation group Defenders of Wildlife. Calves are dark gray and gradually get lighter as they age, becoming totally white upon reaching adulthood.

Beluga whales are listed as Least Concern on the IUCN red list, though they do face challenges.

Read More: Could Translating Whale Songs Help Us Find Aliens?

Beluga’s heads are called melons. Really. The melon is a protrusion on a beluga’s forehead, made up of fatty tissue and muscle. A study published earlier this year documented and quantified what beluga experts already knew: Belugas can alter the shape of their melons, creating a ...

  • Avery Hurt

    Avery Hurt

    Avery Hurt is a freelance science journalist who frequently writes for Discover Magazine, covering scientific studies on topics like neuroscience, insects, and microbes.

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