Harp seals migrate in large groups as much as five thousand miles (8,000 km) from feeding grounds in the north to breeding grounds in the south.
They spend about half the year in the north, feeding on fish and invertebrates.
In the spring, thousands of females congregate on pack ice to give birth and nurse their white-furred pups.
Following weaning, the pups shed their white fur, which is replaced by silver-gray pelage with dark spots. After successive molts, the spots are replaced by the typical harp-shaped marking on the back.
By June the harp seals are moving northward again, swimming and cavorting in the frigid water.
There are three populations of this gregarious seal: one off Newfoundland, one in the Arctic Ocean, and one off Greenland.
Name: Harp Seal (Phoca groenlandica)
Family: Phocidae (Earless Seals)
Range: Northern Atlantic and Arctic oceans
Habitat: Arctic waters and ice floes
Diet: Cod, capelin, herring, halibut, and small crabs
Total Length: 4.6 to 6.6 feet (1.4 to 2 m)
Weight: 220 to 320 pounds (100 to 145 kg)
Life Cycle: Mating February to April, implantation delayed 60 to 90 days; gestation 210 to 240 days, one pup born
Description: Silver-white fur; black head; dark markings on the back that resemble harps; wide face; close-set eyes
Conservation Status: Common
 The manatee, often called the sea cow, is the only exclusively herbivorous marine mammal. It grazes on all kinds of aquatic plants, especially marine sea grasses, assisted by its large prehensile lips, which are studded with bristles.
During the day, it is frequently found close to the surface, sleeping within the top three to ten feet (1 to 3 m). Occasionally it swims down to thirty feet (10 ...
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They weigh from 6 to 12 pounds and can be up to 38 inches in length.
Oncorhynchus kisutch are deep-bodied salmon with unique color characteristics. The dorsal surface is a metallic blue while the sides are a silver color....
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These dolphins are energetic swimmers, sometimes moving upside down and jumping as high as twenty feet (6 ...
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 This seal gets its common name from the numerous dark spots on its coat.
The name leopard seal, though, is sometimes also applied to other spotted seals, such as the Weddell's seal.
A solitary seal, it has huge canine teeth and massive jaws.
Generally it feeds on krill, which it strains from the water with its specialized teeth.
It is the only seal that preys on warm-blooded animals; i...
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