Bearded Seal

Big, Blubbery, and Built for Ice

The bearded seal is one of the larger true seals in the north, with adults typically ranging from seven to eight feet in length and weighing between 575 and 800 pounds. Their bodies are rotund and torpedo-shaped, encased in a thick layer of blubber that provides critical insulation in freezing waters and also serves as an energy reserve during times of fasting or molting. Unlike more streamlined seals, the bearded seal has a square-shaped head, small eyes, and a short, broad snout that enhances its unique look.

Their coat is generally grayish-brown, sometimes reddish depending on algae growth and seasonal conditions, with lighter underbellies. Though not as elaborately patterned as some other Arctic seals, the bearded seal’s most defining physical characteristic remains its vibrant whiskers. These vibrissae can reach up to ten centimeters in length and are highly mobile, allowing the seal to “feel” for prey along the seafloor even in complete darkness.

Females are typically larger than males, a trait common among many true seals. Males, however, make up for their smaller size with their haunting underwater vocalizations, which are especially prominent during the breeding season. These calls travel great distances beneath the ice and likely play a role in both mate attraction and territorial spacing, lending the Arctic seascape an eerie, almost musical atmosphere in the springtime months.

Ice, Water, and Seafloor: Habitat and Range

Bearded seals are circumpolar, found throughout the Arctic Ocean and adjacent seas, including the Bering, Chukchi, Beaufort, Greenland, and Barents Seas. They favor areas where drifting pack ice meets shallow continental shelves, which provide an abundance of food. While primarily ice-associated, they are not as dependent on multiyear ice as some other Arctic species, making them slightly more flexible in their habitat preferences.

They use sea ice for resting, molting, and giving birth, preferring large, stable floes or grounded ice pans that allow easy access to the water below. These resting platforms are crucial for thermoregulation and predator avoidance. Although they are not colonial animals, bearded seals may haul out near one another when ice conditions are favorable, maintaining loose individual territories without the large aggregations seen in other pinnipeds.

In summer and autumn, some bearded seals may venture farther south or even haul out on shorelines, particularly in areas like northern Alaska, Svalbard, or the Russian Arctic coast. However, their life remains deeply tied to the ice edge. The shifting, melting, and re-forming of this ice environment shapes every stage of their existence—from hunting and migration to reproduction and rest.

Bottom Feeders with Delicate Tastes

Bearded seals are benthic foragers, which means they primarily hunt along the ocean floor. Their diet consists of bottom-dwelling creatures such as shrimp, crabs, clams, and other mollusks, as well as various types of fish like sculpin and cod. Unlike swift, high-speed predators, they use a methodical, tactile style of hunting, sweeping their vibrissae along the seafloor to locate buried or camouflaged prey.

Once prey is located, bearded seals use their suction-feeding technique to pull it into their mouths. They create a powerful vacuum by withdrawing their tongue quickly, which sucks small animals out of shells or sediment without needing to bite or chew. This specialized feeding method allows them to take advantage of prey types that many other predators overlook, effectively exploiting a rich but hidden resource layer on the seafloor.

Because they feed in relatively shallow coastal waters, usually less than 200 meters deep, they don’t need to make particularly deep or long dives. Most of their dives last under ten minutes and reach depths of 50 to 150 meters. They forage primarily at night or during twilight periods in winter, when dim light or complete darkness requires them to rely heavily on their tactile sense rather than vision.

Birth, Milk, and Fast-Growing Pups

Reproduction for bearded seals occurs on the sea ice in early spring, typically between April and May. After a gestation period of nearly 11 months, which includes a delayed implantation phase, females give birth to a single pup. These births usually take place on individual ice floes in remote areas, where the mother can maintain close contact with the pup and minimize disturbance from predators or other seals.

Pups are born with a soft, grayish-brown coat and weigh between 65 and 85 pounds. Despite the harsh conditions, their thick blubber layer and nutrient-rich milk help them grow rapidly. Nursing lasts for only about three weeks, but during this time, pups can double or even triple their birth weight. This rapid weight gain is essential to help them survive the cold waters and begin diving and foraging on their own.

Mating occurs shortly after weaning, with males using their vocalizations to attract nearby females and perhaps establish temporary breeding territories. Unlike some other seal species, there is no evidence of aggressive male competition or harem formation among bearded seals. Instead, mating interactions appear relatively peaceful, with pairs coming together briefly before the female departs to resume feeding.

Songs Beneath the Ice: Vocalization and Communication

One of the most remarkable features of the bearded seal is its vocal ability. During the breeding season, males emit a series of trills, moans, and sweeping tones underwater that can travel great distances. These calls are not only beautiful but highly complex, varying between individuals and even regions, suggesting that different “dialects” may exist within the species.

These songs are produced by inflating air sacs in the throat and modulating airflow across vocal cords while underwater. The acoustic properties of sea ice allow the sounds to resonate and travel further than they would in open water. These vocal displays are likely used to advertise presence, attract mates, and possibly avoid confrontations with rival males. The result is a haunting underwater chorus that is now being studied not just by biologists but by composers and sound artists inspired by its strange beauty.

Beyond breeding, bearded seals communicate less frequently but may still use grunts or short vocal bursts, especially between mothers and pups. Their reliance on vocalization, particularly in such an expansive and visually limited environment, underscores the richness of Arctic animal behavior and the importance of acoustic research in understanding it.

Seasonal Molting and Ice Time

Like other seals, bearded seals undergo an annual molt in which they shed their outer layer of skin and fur. This process takes place during the warmer months of late spring and early summer, often after the pup-rearing period. During molting, seals haul out onto the ice for extended periods, basking in the sun and avoiding the cold water while their new coat grows in.

Molting is energetically demanding and leaves the animal more vulnerable to temperature changes and predation, so it typically coincides with times of relative abundance. By using sun-exposed ice floes and maintaining fat stores accumulated during the winter and spring, the bearded seal can complete the molt with minimal disturbance. The resulting new coat is sleek, glossy, and better equipped for the icy water ahead.

Although relatively sedentary during the molt, bearded seals are alert and cautious, frequently shifting positions and maintaining awareness of their surroundings. The calmness of this period contrasts with the constant activity of hunting, birthing, and mating seasons, offering a necessary interval for rest and renewal.

Predators and Perils in a Changing Arctic

Life in the Arctic comes with constant threats, both natural and increasingly man-made. The bearded seal’s primary predators are polar bears, which stalk them on the ice, and killer whales, which target them in open water. In some regions, walruses may also compete for the same benthic prey, though direct conflict is rare. Pups, especially newly weaned ones, are most vulnerable to predation and harsh weather conditions.

However, the greatest modern threat to the bearded seal may not come with teeth. Climate change is rapidly altering the structure and duration of Arctic sea ice, reducing the availability of stable haul-out platforms and secure pupping areas. As the ice forms later in the year and melts earlier, it compresses the window during which pups can be safely raised and adults can molt without disturbance.

Increased ship traffic and oil exploration in Arctic waters introduce further risks, including underwater noise that can interfere with vocalizations, the danger of oil spills, and the potential for habitat fragmentation. While the bearded seal remains relatively abundant and is listed as Least Concern, these mounting pressures make long-term monitoring essential.

Cultural Significance and Future Outlook

To Indigenous peoples of the Arctic, including the Inuit and Chukchi, the bearded seal holds deep cultural and subsistence importance. Its meat provides essential nutrition, its fat is used for oil and light, and its hide is traditionally fashioned into rope, boots, or coverings for kayaks and shelters. This long-standing relationship is based on respect, sustainability, and a deep understanding of the seal’s ecology.

Efforts to preserve Arctic traditions and support Indigenous rights are closely tied to the conservation of species like the bearded seal. Scientific collaborations with local communities have enhanced our understanding of seasonal behavior, migration, and environmental changes. These partnerships are vital for creating policies that honor both ecological needs and human heritage.

Looking ahead, the bearded seal may be better positioned than some other ice-dependent species to adapt to a changing Arctic, thanks to its flexible diet and broad distribution. However, its reliance on sea ice for breeding and molting cannot be overstated. Ensuring that this species continues to thrive will depend on reducing global greenhouse gas emissions, protecting Arctic habitats, and valuing the voices of those who live closest to the seal’s frozen world.