Seals belong to the group of water-living mammals. Unlike whales and manatees, which have completely switched to aquatic life, seals lead a life both in the water and on land. This makes these animals special.
The film shows facts about breeding, mating and physique - how seals and grey seals differ and what dangers come from human influences.
How do seals manage to dive for 30 minutes without taking a breath? How can they hear under water and what is the function of the sensitive whiskers, the so-called vibrissae? These and other questions are answered in the film.