Pygmy hippos share the same general form as a hippopotamus. They have a graviportal skeleton, with four stubby legs and four toes on each foot, supporting a portly frame. The pygmy hippo, however, is only half as tall as the hippopotamus and weighs less than 1/4 as much as its larger cousin. Adult pygmy hippos stand about 75–83 cm (30–32 inches) high at the shoulder, are 150–177 cm (59–70 inches) in length and weigh 180–275 kilograms (400–600 pounds). Their lifespan in captivity ranges from 30 to 55 years, though it is unlikely that they live this long in the wild.
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