Antarctic Fur Seal

About Antarctic Fur Seal

Once hunted nearly to extinction, Antarctic fur seals have made a remarkable recovery. Males are large and territorial, while females and juveniles are playful and intensely curious about divers. South Georgia hosts over 95% of the world population. Underwater encounters with young fur seals are among the most joyful experiences in Antarctic diving.

Quick Facts

• Habitat: The Antarctic Fur Seal, *Arctocephalus gazella*, is predominantly found in the **Southern Ocean**, particularly around the sub-Antarctic islands within the **Antarctic Convergence** zone. Their breeding strongholds are concentrated on islands such as **South Georgia**, Bouvet Island, and the South Shetland Islands, a chain stretching southwest to northeast off the Antarctic Peninsula. During the breeding season from November to March, vast colonies can be observed along the rocky shorelines and beaches of these islands. Outside of the breeding period, these highly pelagic seals disperse widely across the open ocean, often ranging as far north as the coasts of South America and South Africa, following productive currents and foraging grounds. They prefer **cold, nutrient-rich waters** teeming with prey. While not typically found on the Antarctic continent itself, their oceanic wanderings can bring them close to its ice-laden waters during non-breeding months, although they generally avoid the heavy pack ice. Divers encounters are almost exclusively confined to the island breeding colonies.
• Diet: Antarctic Fur Seals are **opportunistic and highly skilled predators**, with their diet primarily consisting of **krill, particularly Antarctic Krill** (*Euphausia superba*). During the breeding season, krill can constitute over 95% of their diet, showcasing their exceptional adaptation to this abundant food source in the Southern Ocean. They are agile and efficient hunters, using their streamlined bodies and powerful flippers to pursue krill swarms underwater. Beyond krill, their diet can diversify to include a range of other prey depending on availability and location, such as **small fish** (e.g., myctophids or lanternfish) and **squid**. They typically forage at night, when krill often ascend closer to the surface, making them more accessible. These seals exhibit remarkable diving abilities, capable of descending to depths of over 100 meters and holding their breath for several minutes to capitalize on deep-water prey aggregations, although most foraging occurs in the upper water column. Their excellent eyesight and vibrissae (whiskers) aid them in detecting prey in low light conditions.
• Best season: The **optimal season** for encountering Antarctic Fur Seals while diving is during the **austral summer**, specifically from **late November through March**. This period directly coincides with their breeding season, which sees large aggregations of seals converging on their sub-Antarctic island breeding grounds, most notably **South Georgia** and the South Shetland Islands. During **December and January**, the females give birth and begin nursing their pups, while males vie for territories, making these months particularly active and dynamic. By **February and March**, the pups are weaning and becoming more independent, and juvenile seals are often more curious and playful in the water. Divers visiting these regions outside of this timeframe are much less likely to encounter these seals in significant numbers, as the animals disperse widely across the Southern Ocean for pelagic foraging. Water temperatures during this season, while still cold, are at their most 'temperate' for the region, generally ranging from 0°C to 5°C, requiring **dry suit diving** equipment. Ice conditions around the islands are also at their most favorable during the austral summer, allowing for better access to dive sites.

Fun Facts

They were hunted so heavily in the 1800s that fewer than 100 were thought to remain,Males can weigh up to 8 times more than females,Juveniles are extremely playful and often approach divers,They can rotate their hind flippers forward to walk on land

Diving Tips

When diving with Antarctic Fur Seals, **maintain a respectful distance** at all times; a minimum of **5 meters** is generally recommended, although more cautious distances may be prudent depending on the individual animal's behavior. While often curious, especially younger animals, **do not pursue, touch, or feed** them. Allow them to approach you on their own terms. If a seal exhibits aggressive behavior, such as direct charges or vocalizations signalling discomfort, **slowly and calmly retreat**. Be aware of your surroundings, as they are exceptionally fast and agile in the water. Their speed can be surprising, and they can be quite playful, often nipping at fins or cameras. Ensure your dry suit, gloves, and hood are in excellent condition, as the water temperatures in their habitat are extremely cold, often near freezing. For spotting cues, listen for their distinctive barks and growls emanating from shore, which indicate the presence of colonies. In the water, look for quick, darting movements from the periphery of your vision; their dark, sleek bodies can blend surprisingly well with the deep blue. Always dive with a **trained expedition leader or guide** who is experienced with Antarctic wildlife and local regulations. Adherence to **IAATO (International Association of Antarctica Tour Operators) guidelines** and any specific national park or protected area regulations is paramount for the safety of both divers and seals. Remember, these are wild animals, and their behavior can be unpredictable.