<Tr> <Td_colspan="2"> <P> Phoca groenlandica </P> </Td> </Tr> <P> The harp seal or saddleback seal (Pagophilus groenlandicus) is a species of earless seal native to the northernmost Atlantic Ocean and parts of the Arctic Ocean . It now belongs to the monotypic genus Pagophilus . Its scientific name means "ice - lover from Greenland", and its synonym, Phoca groenlandica means "Greenland seal". Originally in the genus Phoca with a number of other species, it has since been reclassified into its own genus Pagophilus . </P> <P> The harp seal has a silvery - gray body . Its eyes are pure black . It has black harp or wishbone - shaped markings on the back . The baby harp seal pup has a yellow - white coat at birth, but after three days, the coat turns white and stays white for about 2--3 weeks . Adult harp seals grow up to be 1.7 to 2.0 m (5 ft 7 in to 6 ft 7 in) long and weigh from 140 to 190 kg (310 to 420 lb). </P> <P> Harp seals combine anatomical and behavioural approaches to managing their body temperatures, instead of elevating their metabolic rate and energy requirements . A thick coat of blubber insulates its body and provides energy when food is scarce or during fasting . Blubber also streamlines its body for more efficient swimming . Brown fat warms blood as it returns from the body surface as well as providing energy, most importantly for just - weaned pups . </P>

When do harp seals lose their white coats
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