Harbour seals are brown, tan, or gray, with V-shaped nostrils. They have a rounded head, spindle-shaped body with spots or rings visible on the dorsal surface and short flippers. An adult will weigh around 132 kilograms. Harbour seals are found in coastal waters of the northern Atlantic and Pacific Oceans as well as those of the Baltic and North Seas, making them the most wide-ranging of the pinnipeds (walruses, eared seals, and true seals).
Harbour Seals are carnivorous and prey mainly upon fish such as anchovy, sea bass, herring, cod, whiting and flatfish. They also feed on shrimp, mollusks and squid. Harbour seals do not chew their food; they either tear it into chunks or swallow it whole. The harbour seal can plunge 300 feet and stay underwater up to 28 minutes. Harbour seals are preyed upon by great white sharks and killer whales.