Manatees are marine mammals.
Manatees are mammals that live in warm fresh water and seawater. They belong to the group or Order Sirenia which includes both manatees and dugongs. The five species or types of animals in this order include the West Indian manatee, West African manatee, Amazonian manatee, dugong, and Steller's sea cow. Unfortunately, the Steller's sea cow is extinct. Heavy herbivores Manatees weigh about 1,200 pounds and measure around ten feet in length.