Northern Elephant Seal

(Mirounga Angustirostris)

Northern elephant seals are earless seals (true seals). This species is among the largest of all seals, second only to the Southern elephant seal.

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Carnivora
Pinnipedia
Phocidae
Mirounga
angustirostris
Adult (Average) Size: Male: up to 14′, 4,400 lbs. Female: up to 10′, 1,300 lbs.
Habitat: Temperate waters; subtropical sandy beaches during breeding and  molting times
Range: Gulf of Alaska south to Baja California; Breeds on islands from Farollons off California coast south to Benito Island off Baja California. (California rookeries at Ano Nuevo, Pt. Reyes, Big Sur, and Channel Islands)
Migratory Patterns: Long‑distance seasonal migrations
Social Organization During Breeding: Colonial; moderate sized to extremely large groups
Mating Behavior: Polygynous
Sexual Maturity: Male: 5 years; Female: 2 to 6 years
Mating Season: Mid‑February
Gestation Period: 11 months (4 months delayed implantation)
Pupping Season: December to mid‑March (peak pupping season: Late January ‑ early February)
Size at Birth: 3 ‑ 5 ft. (60 – 80 lbs.)
Lactation (Nursing) Period: 22 ‑ 29 days approximate
Usual Diet: Squid, small sharks, rays and other deep water species
Amount of Food per Day: Juvenile: 10 lbs. to 12 lbs.; Adults: 50 lbs. to 100 lbs.
Predators: Orcas and great white sharks
Diving Depth: Average Dive: 450 ft. Have been recorded to dive to depths of 5,000 ft.
Submersion Times: They can easily remain submerged for 20 minutes, with a maximum of 119 minutes
Longevity: Average lifespan for most pinnipeds is estimated to be from 15 to 25 years.  Females generally longer than males.
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