- Info:The Harbor Seal or the Common Seal, are found in the northern Atlantic and the Pacific Oceans. They are also found in the North Seas and the Baltic region. There are a number of Harbor Seals who routinely rest on the rocky shores in Long Beach, California. The Harbor Seals are considered pinnipeds, or a fin-footed animal. Harbor Seals are in the same family as walruses, eared seals, and true seals. Generally, Harbor Seals are brown or gray in color and have nostrils in the shape of a V. The adult Harbor Seal can grow up to about 6 feet long and up to about 300 lbs. Female Harbor Seals will generally outlive the male Harbor Seal by about 10 years living to the age of 35. Southern California Harbor Seal Population Harbor Seal are not an endangered species with an estimated global population of about 400,000 to 500,000, however there are some subspecies who are threatened, particularly in the Greenland, Hokkaido, and Baltic Sea regions. For the most part, seal hunting has been made illegal, with some exceptions. However, there is still a problem with seals getting caught in fishing nets. Sometimes Harbor Seal are actually targeted by fishermen as they are seen as a threat to fisheries.