Individual harbor seals possess a unique pattern of spots, either dark on a light background or light on a dark. They vary in colour from brownish black to tan or grey; underparts are generally lighter. The body and flippers are short,

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There are an estimated 350,000–500,000 harbor seals worldwide. While the population is not threatened as a whole, the Greenland, Hokkaidō and Baltic Seapopulations are

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Harbor seals prefer to frequent familiar resting sites. They may spend several days at sea and travel up to 50 km in search of feeding grounds, and will also swim more than a hundred miles upstream into fresh water in large rivers in search of migratory fish like

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• Andre, rescued and trained by his owner Harry Goodridge, he became an iconic figure in his hometown of Rockport, Maine.
• Hoover, also rescued from a Maine harbor. Hoover became

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• Conservation of Seals Act 1970 (in the UK)
• Marine Mammal Protection Act (in the United States)
• Wadden Sea Agreement (in the Netherlands, Germany and Denmark)

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• "Phoca vitulina". Integrated Taxonomic Information System. Retrieved 23 March 2006.
• Harbor Seals at Stanford University

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Harbor seals are solitary, but are gregarious when hauled out and during the breeding season, though they do not form groups as large as some

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