• The seal lives to 50–56 years — one of the records among seals.
• The Baikal seal is a pagophilic species: during periods of continuous ice cover, its life cycle is closely linked to this cover.

The Baikal seal, inhabiting the lake year-round, has a lifespan from 20 to 45 years, with the maximum recorded lifespan being 56 years, with a theoretical lifespan from 28 to 56 years. Sexual maturity occurs in the period from 4 years 5 months to 7 years 4 months. The embryo develops inside the mother for approximately nine months and does not feed independently; the pup’s eyes open at birth, and the calf is born on ice with white fur, receiving nutrition from the mother's very fatty milk and rapidly gaining weight. The puppy stage lasts from 1 to 2 months 2 weeks, after which the animal transitions to the adult stage, which swims well, dives for fish, and can remain underwater for up to forty minutes, and the duration of this stage is from 4 to 50 years.