Quick answer
Grey Seals (Halichoerus grypus) typically live around 25–35 years in the wild. Wild averages fall when predation, disease, or habitat loss rise; managed populations can live longer with stable food and veterinary care.
Key takeaway
Grey Seals (Halichoerus grypus) typically live around 25–35 years in the wild. Wild averages fall when predation, disease, or habitat loss rise; managed populations can live longer with stable food and veterinary care.
Grey Seal lifespan in the wild
Field and museum records place most grey seals near 25–35 years in the wild. That figure blends ages at death across regions, so treat it as a planning range. Body size (100–230 kg (220–510 lb); males larger) and risk lifestyle both shape the average.
What shortens grey seal lives
Predation, infectious disease, injury, food shortages, and habitat fragmentation cut survival. Roadkill and human conflict matter wherever grey seals share landscapes with people.
What helps grey seals live longer
Connected habitat, low chronic stress, and reliable food support longevity. For captive or domestic relatives, species-correct diet and veterinary screening matter more than generic “pet” advice.
Grey Seal life stages
Juveniles usually face higher mortality than prime adults. Older animals may move less, show dental wear, or lose body condition — useful signs when ageing grey seals in the field.
Diet and ecological role
Grey Seals feed on carnivore — fish, squid, and crustaceans. Foraging shifts with season and local abundance. As mammals, they influence food webs — controlling prey, dispersing seeds, or shaping habitat through feeding and movement.
Conservation and coexistence
Listed as Least Concern on the IUCN Red List. Habitat loss, hunting, and climate change threaten many populations. Responsible ecotourism and community conservation help in parts of their range. Never approach or feed wild grey seals.
Sources
Grey Seal FAQs
How long do grey seals live?
Grey Seals (Halichoerus grypus) typically live around 25–35 years in the wild. Wild averages fall when predation, disease, or habitat loss rise; managed populations can live longer with stable food and veterinary care.
What is the scientific name of the grey seal?
Halichoerus grypus — used in research and conservation listings for grey seals.
What do grey seals eat?
Grey Seals eat fish, squid, and crustaceans, with seasonal and regional variation in North Atlantic coasts, islands, and ice edges.
Where do grey seals live?
They are associated with North Atlantic coasts, islands, and ice edges. Local presence depends on food, cover, and human land use.
What is the conservation status of grey seals?
Listed in our guides as Least Concern. Check the IUCN Red List and national assessments for the latest formal category.