Ribbon Seal: where and when to see them

The ribbon seal is a North Pacific ice-associated seal whose adults develop striking pale bands around the neck, torso and foreflipper bases. Adult males usually show the strongest contrast, while females are generally paler. Its main range lies in the Bering and Okhotsk seas, extending seasonally into adjacent waters. Although included in Arctic wildlife catalogs, it is not a widespread circumpolar species and is rarely a realistic shore-viewing target.

Size

1.5-1.8 m long

Weight

70-100 kg

Lifespan

20-30 years in the wild

Status

Least Concern

Ribbon seals gather on seasonal sea ice for birth, nursing, mating and the annual molt, but they are generally less densely social than some other ice seals. Pups are born with a pale woolly coat and develop swimming independence rapidly after weaning. During the ice-free part of the year, animals spend long periods at sea. On ice, they can move with surprisingly quick, sinuous motions using alternating foreflipper strokes. Ribbon seals are generally solitary outside of breeding and molting periods. While on ice, they can be quite alert and often slip into the water quickly if disturbed.

• Adult males generally have darker backgrounds and more contrasting bands than females.
• The characteristic adult bands are not fully developed in newborn pups.
• The species has an unusual internal air sac associated with the trachea, whose function remains uncertain.
• Its range is centered on the North Pacific, not the entire Arctic Ocean.

Spring is the principal season for animals resting on ice during reproduction and molt, but access to this remote habitat is highly constrained. Summer Arctic travel does not automatically overlap visible ribbon seals. No broad, dependable shore-based viewing season can be recommended. Late spring and early summer expeditions in the Bering Sea may offer fleeting chances to spot them on melting ice floes. Their deep-water foraging habits during ice-free months make them particularly difficult to locate reliably.

The species favors seasonal pack ice over the North Pacific continental shelf and nearby deeper waters. Broken ice near the ice edge is important during spring. Once the ice retreats, seals become more pelagic, making accessible coastal haul-outs an unreliable observation prospect. They are primarily an offshore species, rarely found near land except during severe storms. The Bering and Okhotsk Seas are key parts of their range, with some individuals occasionally seen in the Chukchi Sea.

Ribbon seals eat fish, squid and crustaceans, with prey varying by age and region. Pollock and other schooling fishes can be important. Young animals tend to consume smaller prey, while adults exploit a broader range of resources across shelf and deeper-water habitats. Their diet shifts seasonally, reflecting the availability of prey in different water columns. Important deep-water prey includes Pacific cod and various cephalopod species.

Common name

Ribbon Seal

Scientific name

Histriophoca fasciata

Animal group

Marine life

Size

1.5-1.8 m long

Weight

70-100 kg

Lifespan

20-30 years in the wild

Status

Least Concern

Identification

Adults differ from ringed and spotted seals in their broad pale ribbonlike bands rather than numerous small rings or spots, although juveniles lack the full adult pattern. The adult's distinctive dark brown or black body with four broad, white or yellowish ribbons is unmistakable. These ribbons encircle the neck, foreflippers, and posterior body.