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  3. Northern Elephant Seal

One of the 2 elephant seals on WAnimals

Northern Elephant Seal (Mirounga angustirostris)

Mammals · Carnivora · Phocidae

Northern Elephant Seal

Mirounga angustirostris

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

It shows one of the most extreme cases of sexual dimorphism among mammals, with males that can weigh more than five times as much as females.

Weight

400 kg – 2.3 t

Size

2.5 m – 5 m

Life expectancy

15 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Irregular activity

Active at irregular times, by day or night depending on circumstances.

Social structure

Colony

Lives in large concentrations, often for breeding reasons.

Sighting difficulty

Easy

Ocean
3countries4parks5dive sites14same family1natural phenomena1featured routes

AI-generated images: illustrations, not photographs.

Fun facts

  • It makes one of the longest known migrations of any mammal, covering more than 20,000 km there and back every year in search of food.
  • It feeds on deep-water fish and squid, taken on extremely deep dives.
  • It lives on the coasts of the eastern Pacific, mainly California and Baja California.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat and environment
Coasts of the eastern Pacific, mainly California and Baja California
Birth weight
Born black, moulting to silver after weaning
Size at birth
Born black
Sexual maturity
3 years
Gestation / incubation
~11 months, with 2-3 months of delayed implantation
Litter / clutch size
1 young per birth (twins rare)
Life expectancy in captivity
Documented record of up to 15.8 years

Sources consulted: AnAge (genomics.senescence.info); Wikipedia (Northern elephant seal); NOAA Fisheries; PMC (lifetime reproductive success study); Animal Diversity Web

Where to find it

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The pins mark the parks and dive sites where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Northern Elephant Seal — same habitat, park, country, tags or family.

Same taxonomic family
Shares a park
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Related guides

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Based on what we already know about northern elephant seal.

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See full glossary
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Where to see Northern Elephant Seal6 places
CountriesUnited States
ParksChannel IslandsUnited States
TagsCarnivore
Carnivore
Variable activity
Colonial
Ocean
Mammal
United States
Mexico
Canada