- Seals are generally solitary animals. They tend to live on their own instead of in large groups so they do not communicate much with other seals. Occasionally, a seal will make a grunt or sneeze-type noise at another seal.
- Seals are a member of the superfamily pinniped, which means feather-footed. Members of the pinniped group, including seals, sea lions and walruses, have hind flippers that are webbed for swimming.
- Seals are predators and prey. They hunt on smaller aquatic animals, including fish, crustaceans and squid, and some species feed on penguins. Seals are also preyed upon by polar bears, sharks and killer whales.
- Seals are not very agile on land because their pelvis is fused and inflexible. Therefore, the seal can only move like an inchworm while on land. In the water, seals are excellent swimmers, and use their hind flippers to swim and the front flippers for steering.
- Seals give birth at the same time every year, but that time varies depending on the species and their global location. A female seal's body can delay implantation of a fertilized egg until the appropriate time of year that would result in the correct birthing season for that seal.
