Manatees are sea mammals that live in the warm waters of the Carribbean Sea, Gulf of Mexico and waterways of Florida. There are different manatee species that also live in the Amazon River and parts of Africa.
In North America, the manatee population is estimated to be about 2 or 3 thousand animals. The population has been declining because manatees are particularly vulnerable to harm from boat propellers and are often hit and killed or badly injured. Adult manatees can grow up to 10 feet and weigh 1200lbs. They swim only about 5 mph, and spend much of their time grazing on algae and aquatic vegetation.