Gray seal lifespan and age in human years

Longest recorded 42.9 years

🏆 The longest-lived gray seal on record reached 42.9 years in captivity.

Gray seal (Halichoerus grypus). The oldest known individual lived 42.9 years; this chart maps that record to a human age of 120. Most individuals live considerably shorter lives than the record.

• Reaches adulthood at about 4 years
• Adult weight about 268 kg
• Gestation about 240 days
• About 1 young at a time