Beluga Whale

Beluga Whale facts at a glance

How big is a beluga whale?

An adult beluga whale measures 4.5 m long — about 2.6× the height of an average adult person (1.73 m) — and weighs around 1400 kg, about 20× an average adult’s body weight (70 kg).

What is a group of beluga whales called?

Explore more animal collective nouns and baby animal names .

Appearance and adaptations

Belugas are unmistakable: pure white as adults, with a bulbous 'melon' on the forehead and no dorsal fin. That flat back is an adaptation to life among sea ice, letting them swim close beneath the surface and break through thin ice to breathe. Unlike most whales, belugas have unfused neck vertebrae, so they can turn and nod their heads. A thick layer of blubber, up to 40 percent of body weight, insulates them in near-freezing water.

Habitat and seasonal movements

Belugas live in the cold coastal waters, estuaries, and pack ice of the Arctic and sub-Arctic. Many populations migrate with the ice, moving into river mouths and shallow bays in summer and retreating toward the open sea as winter ice advances. They are remarkably at home under ice, using sound and agility to find breathing holes across vast frozen expanses. Some populations gather in warm estuaries each summer to moult their outer skin.

Diet and feeding

Belugas are carnivores with a varied menu of fish such as cod and salmon, along with crustaceans, marine worms, and cephalopods like squid and octopus. They forage on the seabed as well as in open water, using their flexible necks and pursed lips to root out and suck up prey. An adult may eat many kilograms of food a day to fuel its warm-blooded body in icy seas. They often hunt cooperatively, herding schooling fish into tight balls.

Communication and intelligence

Nicknamed 'the canaries of the sea', belugas are among the most vocal of all whales, producing an extraordinary range of clicks, whistles, chirps, and squeals. They rely on echolocation to navigate and hunt in dark or ice-covered waters, reading the echoes of their own clicks. Belugas are highly intelligent and social, living in pods that can merge into gatherings of hundreds. They can even mimic sounds, and captive individuals have been recorded imitating human speech patterns.

Reproduction and life cycle

Females give birth to a single calf after a gestation of roughly 14 to 15 months, usually in warmer summer estuaries. Calves are born grey or brownish and only gradually turn white, reaching the adult colour at around five to nine years of age. A mother nurses her calf for up to two years, and the strong bond keeps young belugas close to the pod. With slow reproduction, belugas can live 35 to 50 years in the wild.

Conservation and threats

The beluga is listed as Near Threatened by the IUCN, though some local populations, such as those in Canada's Cook Inlet and St Lawrence estuary, are far more imperilled. Key threats include pollution, industrial noise that disrupts their sound-based world, shipping traffic, and the loss of sea ice to a warming climate. Historic hunting reduced several stocks, and subsistence hunting continues in parts of the Arctic. Reducing contaminants and underwater noise is central to protecting the species.

Did you know? Beluga Whale facts

• Belugas are white Arctic whales with flexible necks and varied vocalisations nicknamed 'canaries of the sea'.
• Camouflage among sea ice — calves are born dark grey.
• Yes — flexible necks allow unusual manoeuvres unlike most whales.
• Conservation: Near Threatened.

Diet & feeding

Beluga Whale feeds primarily as a fish, crustaceans, worms.

Adaptations

• Melon-shaped foreheads focus sonar clicks for navigation under ice.
• Belugas in tanks face welfare concerns — wild pods travel vast distances.

Behaviour & ecology

• Melon-shaped foreheads focus sonar clicks for navigation under ice.
• Belugas in tanks face welfare concerns — wild pods travel vast distances.

Communication

• Beluga Whale uses scent, posture, and vocal signals to mark territory and coordinate social behaviour.
• Communication intensity often peaks during breeding seasons and territorial disputes.

Habitat & range

Arctic and sub-Arctic seas

Ecological role

Beluga Whale plays a recognised ecological role in arctic and sub-arctic seas.

Conservation status of the Beluga Whale

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Beluga Whale:

• IUCN Red List of Threatened Species

  Conservation status (Near Threatened) reflects the IUCN Red List category for Delphinapterus leucas, most recently assessed in 2017.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Delphinapterus leucas. Useful for range checks and recent sightings — not a substitute for formal Red List status.

• GBIF — occurrence data

  Global Biodiversity Information Facility species search for Delphinapterus leucas. Explore published occurrence records used in range research.

• IUCN Red List — Delphinapterus leucas.

  Conservation status (Near Threatened) and population trends.

• Animal Diversity Web — Delphinapterus leucas. University of Michigan Museum of Zoology.

  Life history, morphology, and range.

• Global Animal Guide editorial standards

  How we research, source, review, and update every guide for accuracy.