Northern Elephant Seal

Northern Elephant Seal facts at a glance

How big is a northern elephant seal?

An adult northern elephant seal measures 3.5 m long — about 2.0× the height of an average adult person (1.73 m) — and weighs around 900 kg, about 13× an average adult’s body weight (70 kg).

What is a group of northern elephant seals called?

Explore more animal collective nouns and baby animal names .

Size and the elephant-like nose

Northern elephant seals are named for the large, inflatable snout of adult males, which resembles a short trunk and hangs over the mouth. Bulls are among the largest of all seals, growing to roughly 3.5 m and weighing from 400 kg up to about 2,300 kg, while females are far smaller. Males use the trunk-like proboscis as a resonating chamber, producing deep, clattering roars that carry across a crowded breeding beach. This dramatic size difference between the sexes is one of the most extreme of any mammal.

Record-breaking diving

Few mammals dive as deeply or for as long as the northern elephant seal. Individuals routinely descend hundreds of metres and can reach depths beyond 1,500 m, staying submerged for 20 minutes or more between short breaths at the surface. They spend most of the year at sea, diving almost continuously day and night to hunt in the cold, dark water column. Special adaptations, including large blood volume and oxygen-rich muscle, let them stay under far longer than their lung capacity alone would allow.

Diet and hunting at depth

Elephant seals are carnivores that feed mainly on squid, deep-sea fish, and occasionally rays and small sharks. They hunt in the twilight and dark zones of the open ocean, using sensitive whiskers and large eyes to detect prey where little light reaches. Because they feed far offshore and deep down, they rarely compete with coastal fisheries. A foraging seal may travel thousands of kilometres across the Pacific during a single trip to sea.

Breeding beaches and battles

Each winter, northern elephant seals haul out on beaches in California and Baja California, Mexico, to breed. Dominant bulls fight for control of harems of females, rearing up and slamming their chests and necks together in bloody clashes. Females give birth to a single pup and nurse it on extremely rich milk for about a month before returning to sea. Only the largest, most dominant males win the right to mate, so the winners father a large share of the pups.

Recovery from near-extinction

The northern elephant seal is a rare conservation success story. Hunted relentlessly for its blubber oil in the nineteenth century, the species was reduced to perhaps fewer than 100 animals before protection began. Given legal protection by Mexico and later the United States, the population has rebounded into the hundreds of thousands and is now listed as Least Concern by the IUCN. Because all living individuals descend from that tiny remnant, however, the species carries very low genetic diversity.

Time on land and moulting

Although superb swimmers, elephant seals are ungainly on land, hauling themselves along at up to about 16 km/h in short bursts. They come ashore twice a year: once to breed and again to moult, when they shed skin and fur in large patches during a so-called catastrophic moult. During these weeks on land they fast, living off stored blubber rather than feeding. Between these visits they are almost entirely oceanic, returning to the same beaches year after year.

Did you know? Northern Elephant Seal facts

• Northern elephant seals are the largest seals in the Northern Hemisphere — bulls reach 2,300 kg.
• Male proboscis inflates during breeding displays — resembling an elephant trunk.
• Bulls fight fiercely in breeding season; keep distance on beaches.
• Conservation: Least Concern.

Diet & feeding

Northern Elephant Seal feeds primarily as a squid and deep-sea fish.

Adaptations

• Hunted near extinction by 1900, the population now exceeds 200,000.

Behaviour & ecology

• Hunted near extinction by 1900, the population now exceeds 200,000.

Communication

• Northern Elephant Seal 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

Pacific coast of North America

Ecological role

Northern Elephant Seal plays a recognised ecological role in pacific coast of north america.

Conservation status of the Northern Elephant Seal

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Northern Elephant Seal:

• IUCN Red List of Threatened Species

  Conservation status (Least Concern) reflects the IUCN Red List category for Mirounga angustirostris.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Mirounga angustirostris. 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 Mirounga angustirostris. Explore published occurrence records used in range research.

• IUCN Red List — Mirounga angustirostris.

  Conservation status (Least Concern) and population trends.

• Animal Diversity Web — Mirounga angustirostris. 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.