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Steller Sea Lion

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A Steller sea lion photographed at Ocean Park in Hong Kong

About the Steller Sea Lion

Stellers are the largest of all sea lions and they have an appetite to match. These giant pinnipeds hunt fish, squid, octopus and, rarely, smaller seals. They are found off northern Pacific coasts from Japan to California.

Breeding Rituals

Steller sea lion breeding is one of nature's great mass spectacles. When these giants thunder ashore, their favored beaches, called rookeries, disappear under their numbers. Young pups are sometimes crushed by the throng, unheeded by powerful males with only a single purpose in mind. Bulls (males) must establish and hold a beach territory in order to breed. Most do not achieve this until they are nine or ten years of age.

Females begin to reproduce at about five years of age and typically have one pup per year. Sea lion mothers care for their young and recognize them by a keen sense of smell. Females slip into the sea to hunt and return to their young with the day's catch—identifying their own offspring by touch and scent.

Size

These animals are social and also gather at various times throughout the year when mating and breeding are not taking place. Even in crowds, the big bulls are unmistakable—they are three times larger than females.

Population Decline

Most Steller sea lion populations declined markedly in the 1980s and 1990s, even though the animals are protected. Scientists are unsure what factor or combination of factors was responsible for the decline.


WATCH: Dive With Dozens of Playful Sea Lions

While diving off the coast of Vancouver Island, a group of sea lions surrounded a diver, biting his mask and even swimming through his legs.