Seals, seals, seals! And so many pups! Harbor seals range in color from brown to gray, with visible spotting, and blend in well with their surroundings when hauled out on a rock or ledge. Males weigh from 120 to over 300 pounds and run about five to six feet in length; females are slightly smaller. While big animals, the harbor seal is only about half the size of the gray seal, the other seal species that breeds in Maine waters.
Adult female gray seals are about 7.5 feet long and weigh about 550 pounds, while adult males can reach 10 feet and weigh 880 pounds. In addition to body size, the harbor seal can be distinguished from the gray seal by the shape of its head: the gray seal has a longer, horse-like head with parallel nostrils, compared to the harbor seal’s dog-like head with V-shaped nostrils. Both species are “earless” seals with no visible ear flaps.