Sebastian Kennerknecht / Harbor Seal (Phoca vitulina) pup, Elkhorn Slough, Monterey Bay, California

Sebastian Kennerknecht / Harbor Seal (Phoca vitulina) pup, Elkhorn Slough, Monterey Bay, California

Suzi Eszterhas / Harbor Seal (Phoca vitulina) mother and pup nuzzling, Monterey Bay, California

Suzi Eszterhas / Harbor Seal (Phoca vitulina) group on ice floes, Prince William Sound, Alaska

Suzi Eszterhas / Harbor Seal (Phoca vitulina) group, Katmai National Park, Alaska

Ingo Arndt / Harp Seal (Phoca groenlandicus) pup on ice, Magdalen Islands, Gulf of Saint Lawrence, Quebec, Canada

Jasper Doest / Common Seal (Phoca vitulina) on beach, Donna Nook Nature Reserve, England

Michio Hoshino / Harp Seal (Phoca groenlandicus) pup lying in the snow

Suzi Eszterhas / Harbor Seal (Phoca vitulina) pup in shallows, Elkhorn Slough, California

Mitsuaki Iwago / Harp Seal (Phoca groenlandicus) resting on snow, Gulf of St Lawrence, Canada

Michio Hoshino / Harp Seal (Phoca groenlandicus) mother surfacing at ice hole to tend to her newborn pup, Gulf of St Lawrence, Canada

Norbert Wu / Harbor Seal (Phoca vitulina) swimming underwater, Monterey, California