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Typically it is used to prevent the leakage of one high pressure fluid into a lower pressure fluid. Mechanical seals are devices that are used to provide a seal at the point of entry or exit of a rotating shaft. Carmody, in Fluid Machinery Congress 6-7 October 2014, 2014 1 INTRODUCTION The seals are protected in the US as well as in the UK.C.J. Its pups sport a silky white fur, and they fatten fast owing to their mother's fat-rich milk. Other prey includes wrasse, sand eels, lobsters, gadids, herring, skates, and flatfish. The gray seal preys on fish, majorly demersal or benthic species, obtained at depths down to 230 feet or more. The gray seal is large, and the eastern Atlantic bulls can reach lengths of 8.2 feet to 10.8 feet with the females being 5.2 to 6.6 feet long. The gray seal inhabits the shores of the North Atlantic. The harp seal's conservation status is listed as least concern. Female harp seals are ready to mate at five or six years after which they bear a single pup yearly mostly in late February. Harp seals are very social, and they can be quite noisy. The seal prefers to stay in the ocean and spends fairly little time on land. The pup is born with a yellowish-white coat which becomes white after three days for two to three weeks. Its body appears silvery-gray with wishbone-shaped or black harp marks on its back. The harp seal is indigenous to the northernmost regions of the Atlantic Ocean and some areas of the Arctic Ocean. It is estimated that fewer than 700 individuals continue to survive. Its current habitat range has reduced, and it now includes the Cabo Blanco region in the northeastern Atlantic Ocean, the Aegean Sea, and the Madeira archipelago. The animal formerly had a wide range of habitat which included all of the Mediterranean offshore islands, the Black Sea, and the Atlantic and its islands. Reproductive maturity for the seal is reached at roughly age four while the average lifespan falls between 20 to 25 years. It grows from about 2.6 feet in length at birth to an average of 7.9 feet in adults. The Mediterranean monk seal is classified in the Phocidae family. The animals mate and give birth on the shores and also escape to the beaches from predators such as killer whales and sharks. Most seal species inhabit the cold waters of the Southern and Northern Hemispheres. When compared to dolphins, seals are more agile and flexible. The streamlined bodies of seals feature four limbs which have been modified to function as flippers.
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The size of seals ranges from 3 feet 3 inches for the Balkan seal to 16 feet for the southern elephant seal which ranks as the largest carnivoran. Seals are a diverse group of semi-aquatic mammals in the Order Carnivora.