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July 26, 2026Sources cited
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Science & Nature • Marine Mammals

Beluga whale

The beluga whale (*Delphinapterus leucas*) is a small toothed whale native to Arctic and subarctic waters.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The beluga whale (Delphinapterus leucas) is a small toothed whale native to Arctic and subarctic waters. Adults are typically white, have a rounded forehead called a melon, and a flexible neck, and they are known for social behaviour and vocalisations. The species is also called the white whale or sea canary.

Description

Beluga whales are medium-sized odontocetes with a rounded forehead, flexible neck, and thick blubber adapted to cold water. Their white adult colouration and lack of a dorsal fin make them distinctive among whales.

Distribution and habitat

The species occurs in Arctic and subarctic waters of the Northern Hemisphere, including areas around Canada, Alaska, Greenland, and Russia. Belugas use a range of habitats, from open water to coasts, estuaries, and rivers.

Behaviour and diet

Belugas are social animals that often travel in pods and produce a wide range of sounds. They feed on fish and invertebrates such as crustaceans, worms, squid, and other small marine prey.

Conservation

The global conservation status of beluga whales is generally listed as Least Concern, but individual populations vary widely. Some regional groups face pressures from pollution, hunting, ice conditions, and other human activities.

Key facts

  • Beluga whales are born grey and gradually turn white as they age.
  • They lack a dorsal fin and instead have a dorsal ridge.
  • Belugas are highly vocal and are sometimes called the “canaries of the sea.”
  • They live in coastal, estuarine, river, and offshore Arctic and subarctic waters.
  • Their range includes waters off Canada, Alaska, Greenland, and Russia.
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Canadian context

Beluga whales are found in Canadian Arctic and subarctic waters, including areas around Nunavut, Quebec, Newfoundland and Labrador, and the St. Lawrence region, making them relevant to Canadian wildlife and conservation.

Frequently asked questions

What is a beluga whale?
A beluga whale is a small toothed whale, scientifically named Delphinapterus leucas, that lives in Arctic and subarctic waters.
Why are beluga whales white?
Belugas are born grey and become white as they mature, which is a key feature of adult animals.
Why are beluga whales called sea canaries?
They are nicknamed sea canaries because they are highly vocal and produce many whistles, clicks, and other sounds.
Where do beluga whales live?
They live in Arctic and subarctic waters, including coastal areas, estuaries, rivers, and offshore waters around Canada, Alaska, Greenland, and Russia.
Are beluga whales endangered?
The species as a whole is generally assessed as Least Concern, but some local populations are threatened or depleted.
How big do beluga whales get?
Adults are usually about 3.5 to 5.5 m long, with males typically larger than females, and may weigh up to about 1,500–1,600 kg.

References

  1. Alaska Department of Fish and Gamehttps://www.adfg.alaska.gov/index.cfm?adfg=beluga.main
    Supports: species description, size, habitat, life expectancy, alternate names
  2. Alaska Department of Fish and Gamehttps://www.adfg.alaska.gov/static/education/wns/beluga_whale.pdf
    Supports: odontocete classification and general species information
  3. WWF Arctichttps://www.arcticwwf.org/wildlife/beluga-whale/
    Supports: scientific name, size, lifespan, conservation status, Arctic range
  4. National Geographic Kidshttps://kids.nationalgeographic.com/animals/mammals/facts/beluga-whale
    Supports: social behaviour, vocalisations, diet, migration, scientific name, lifespan
  5. World Wildlife Fundhttps://www.worldwildlife.org/blogs/good-nature-travel/posts/ten-interesting-facts-about-beluga-whales
    Supports: nickname, relation to narwhal, threats, social behaviour
  6. Discover Wildlifehttps://www.discoverwildlife.com/animal-facts/marine-animals/beluga-whale-facts
    Supports: range, size, lifespan, locomotion and predators