Manatees are big gray mammals that are very kind and gentle.
Manatees are slow and need to come to the surface of the water for air, and because of this reason they are vulnerable. Over time they have become endangered. Manatees are on the endangered species list because man throws trash in the water and it chokes them to death or cuts them and they die of loss of blood. Another reason that they are on the endangered species list is that when they surface for air speeding boats run over them with there propellers and they die. As more and more people build homes near their habitats, they are crowded out.