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...tween color. It is said that Manatees can hear very well despite the absence of external ear lobes. They make sounds such as squeaks and squeals when frightened, playing, or communicating. Manatees are mammals and breath air through their nostrils. They are capable of exchanging ninety-eight percent of their lungs capacity in one breath. Manatees are found in coastal waterways, estuaries, saltwater bays, rivers and canals especially where sea grass beds are located. Manatees in captivity are feed lettuce and other greens, and given elephant vitamins. SHENIKWA LEE 712C MARCH 17,2003 SCIENCE IS143 MR.KERN Female Manatees mature around five to nine years of age, and males mature between six and nine years old. Their gestation period is around 13 months and newborns normally weigh forty pounds at birth and stay with their mother for several years. It is very rare for Manatees to have twins. Mature females give birth to a single calf once every two to five years. The Manatee claves suckle milk from their mothers breasts which are located just under the back edge of their flippers. When these calves are born they weigh about seventy-five to ninety-five pounds, and are almost two and a half feet long. Manatees double their birth weight in just a couple of months. Manatees at three to five months old begin to eat submerged vegetation such as hydraulic, ribbon grass, turtle gra...