Fur Seal
Fur seals are medium-sized eared pinnipeds found across the cold waters of the Southern Hemisphere. Unlike true seals, they have visible external ear flaps and long front flippers that allow them to prop themselves upright on land. Two layers of fur, a coarse outer coat and a dense, water-repelling underfur, keep them insulated in frigid seas. Males are dramatically larger than females, sometimes four to five times their weight, and compete aggressively for territories during the breeding season. They are strong, agile swimmers that dive repeatedly for fish, squid, and krill, sometimes reaching depths of over 200 meters. Most species nest in large, noisy colonies on rocky shores and offshore islands. Heavily hunted during the 18th and 19th centuries for their prized pelts, most populations have since recovered under legal protection, though climate change and competition with commercial fisheries remain ongoing concerns.
Habitat and range
Fur seals are creatures of cold, productive seas. They breed and rest on rocky shores, sea cliffs, and offshore islands scattered across the Southern Hemisphere, with colonies established in South America, the Falkland Islands, southern Africa, Australia, New Zealand, and the subantarctic islands surrounding Antarctica. Most species prefer exposed, wave-washed coastlines where predators struggle to reach them. Outside the breeding season, individuals range widely across open ocean, sometimes traveling thousands of kilometers in search of food. The waters they favor are typically rich in fish and squid, often where cold upwellings bring nutrients to the surface. Some species, such as the Antarctic fur seal, concentrate heavily around the island of South Georgia, one of the most important breeding sites in the world.
Appearance
One of the most striking things about fur seals is the coat that gave them their name. Beneath a coarse outer layer sits a dense underfur so tightly packed that water rarely reaches the skin, providing insulation in freezing seas. Unlike true seals, they have small but visible external ear flaps, and their long front flippers allow them to lift their bodies off the ground and move with surprising agility on land. The difference in size between males and females is remarkable. Adult males can weigh four to five times as much as females, and in some species they develop thick manes of fur around the neck and shoulders. Coat color varies by species and age, ranging from dark brown or gray in adults to pale silver or cream in newborn pups.
Behavior
At sea, fur seals are powerful and nimble, using their front flippers to propel themselves through the water in a style quite different from the undulating motion of true seals. They are capable of diving to depths of over 200 meters and can stay submerged for several minutes at a time, though most foraging dives are much shallower. On land, the social life of a fur seal colony is loud and intense. During the breeding season, males arrive early to stake out territories on the beach, and competition between rivals can turn physical, with biting and pushing matches that may leave visible scars. A successful male may hold a territory containing many females. Outside the breeding season, both males and females spend long periods at sea, returning to shore mainly to rest.
Diet
Fish, squid, and krill form the backbone of the fur seal diet, though the exact mix depends on the species and the ocean region it inhabits. Antarctic fur seals rely heavily on Antarctic krill, which is extraordinarily abundant in the waters around South Georgia and the broader Southern Ocean. Species living closer to temperate coastlines tend to focus more on fish and squid. Fur seals are pursuit predators, chasing prey through the water column with bursts of speed. Most feeding takes place at night, when many of their prey species rise toward the surface, making them easier to locate and catch. Nursing mothers face a particular challenge, needing to consume enough food during their trips to sea to produce the rich milk that their pups depend on for rapid growth in the first weeks of life.
History and recovery
Few animals suffered as severely from commercial hunting as fur seals did. From the late 1700s onward, sealers from Europe and North America descended on Southern Hemisphere colonies in enormous numbers, drawn by the exceptional quality of the underfur. Entire colonies were eliminated within years of discovery. South Georgia alone saw millions of seals killed before populations collapsed. By the early 20th century, several species had been pushed to the edge of extinction. The gradual introduction of legal protections through the 1900s, including international agreements covering Antarctic waters, allowed most populations to rebound significantly. The Antarctic fur seal, once nearly gone, now numbers in the millions. Recovery has not been universal, and some regional populations remain below historical levels, but the overall story is one of remarkable resilience when hunting pressure is removed.
Current threats
Despite their recovery, fur seals face a range of pressures that conservation authorities continue to monitor closely. Entanglement in fishing nets and longlines kills individuals each year and is particularly well documented in South African and South American waters. Competition with commercial fisheries over shared prey species, especially fish and squid, can reduce the food available to nursing females and growing pups. Climate change poses a more complex challenge. Shifts in ocean temperature alter the distribution and abundance of krill and other prey, forcing seals to travel farther and dive more often to find enough food. In El Niño years, when warm water displaces cold productive currents, breeding success can fall sharply in affected regions. Pollution, boat disturbance near colonies, and the introduction of diseases by tourists and researchers also contribute to ongoing stress on local populations.
Technical factsheet
Where it is found
The Fur Seal can be found in places such as:
Frequently Asked Questions
What do fur seals eat?
Fur seals feed mainly on fish, squid, and krill, though the exact diet varies by species and location. Antarctic fur seals depend heavily on krill, which swarms in vast numbers around South Georgia. Species living near temperate coastlines eat more fish and squid. Most hunting happens at night, when prey rises toward the surface. Nursing mothers need to eat especially large amounts to produce the rich milk their pups need to grow quickly.
Where do fur seals live?
Fur seals are found across the cold waters of the Southern Hemisphere. They breed on rocky shores and offshore islands in South America, the Falkland Islands, southern Africa, Australia, New Zealand, and the islands surrounding Antarctica. South Georgia is one of the most important sites in the world for the species. Outside the breeding season, individuals roam far out to sea, sometimes covering thousands of kilometers in search of food.
How deep can fur seals dive?
Fur seals are impressive divers. They can reach depths of over 200 meters and stay underwater for several minutes at a time. That said, most of their dives during a typical feeding trip are much shallower, as a lot of their prey is found in the upper layers of the ocean. They use their powerful front flippers to propel themselves, making them agile and fast in the water compared to other seal species.
Why were fur seals nearly hunted to extinction?
Fur seals were targeted for their remarkably dense underfur, which was highly prized by the fashion industry in Europe and North America. From the late 1700s onward, hunting was so intense that entire colonies were wiped out within years of being discovered. South Georgia alone lost millions of animals. By the early 20th century, several species were on the edge of disappearing entirely. Legal protections introduced throughout the 1900s allowed most populations to recover.
Are fur seals dangerous to humans?
Fur seals are generally not aggressive toward people, but they can bite if they feel threatened or cornered, especially during the breeding season when males are defending territories. Adult males in particular are large and can move surprisingly fast on land. Visitors to colonies are advised to keep a respectful distance and avoid blocking an animal's path to the sea. As long as people behave calmly and give the animals space, encounters are rarely a problem.
How is climate change affecting fur seals?
Climate change is shifting the distribution and abundance of the prey that fur seals depend on. When ocean temperatures rise, krill and fish populations can move or decline, forcing seals to travel farther and work harder to find food. During El Niño events, warm water displaces the cold currents that support rich feeding grounds, and breeding success can drop sharply as a result. Females that cannot find enough food produce less milk, which reduces pup survival rates.
What is the difference between a fur seal and a sea lion?
Fur seals and sea lions are closely related and share many features, including visible ear flaps and front flippers they use to walk on land. The main difference is the coat. Fur seals have a thick, dense underfur beneath their outer coat, which sea lions largely lack. This underfur is what made fur seals so valuable to hunters. Fur seals also tend to have a slightly narrower snout and are generally a bit smaller than most sea lion species.