The harbour seal, also known as the common seal, is a true seal found along temperate and Arctic marine coastlines of the Northern Hemisphere. The most widely distributed species of Pinniped (walruses, eared seals, and true seals), they are found in coastal waters of the northern Atlantic, Pacific, Baltic and North Seas.
An adult can attain a length of 1.85 m (6.1 ft) and weight up to 168 kg (370 lb).
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Harbour seals can dive deeper than their Grey cousins, diving to 427 meters and staying underwater for almost 30 minutes. However, the average dive is usually a few minutes, going down to 90 meters. They also like to observe humans walking on beaches from the safety of the water, but are wary of humans on land and will rush to the sea if disturbed.