Harp seal (Pagophilus groenlandicus)

Distribution and habitat

Harp seals occur across large portions of the North Atlantic and into the Arctic Ocean. Populations concentrate in well-known regions such as the Gulf of St. Lawrence, the Greenland and Barents seas, and areas of seasonal ice offshore of eastern Canada and western Greenland. During winter and spring they rely on sea ice for pupping and nursing; later in the year they spend much of their time at sea in areas where prey is plentiful. For more on their oceanic range see northern Atlantic and Arctic Ocean summaries.

Description and biology

Adults are silvery-gray with a distinctive darker, harp- or saddle-shaped patch across the back that gives the species its common name. Pups are born with a white, fluffy coat (the "whitecoat") that is shed after a few weeks. Mothers nurse intensively for a short period, commonly around twelve days, during which pups gain body fat rapidly before going to sea. Harp seals feed on a variety of fish and invertebrates and undertake seasonal movements timed to prey availability.

• Key traits: ice-associated breeding, strong maternal investment, rapid pup growth.
• Diet: small schooling fish and crustaceans.
• Predators: polar bears, killer whales, large sharks.

Human interactions and conservation

Harp seals have long been hunted for meat, oil and pelts, and some harvests remain regulated today. Seal pup hunting, particularly of whitecoats, has been controversial and prompted international attention and regulation. Populations fluctuate naturally and in response to changing sea-ice and prey conditions; climate change poses a growing threat by reducing reliable breeding ice. Management and research by government and conservation organizations aim to balance sustainable use, animal welfare concerns, and the species' long-term resilience.

Notable facts include the species' role in northern ecosystems as both predator and prey, its cultural importance to coastal communities, and its taxonomic status as the lone species in Pagophilus. Ongoing monitoring of abundance, distribution and reproduction helps track how environmental change affects this iconic ice-associated marine mammal.