While manatees don't have any true natural predators, they have still become endangered. There are three manatee species worldwide – West Indian, West African, and Amazonian. All three are listed as vulnerable to extinction.

When did manatees become extinct?

The reclassification marked an astounding rebound for the animals, which hovered on the brink of extinction when they were first listed as endangered in 1973. Then, only a few hundred manatees remained.

What would happen if manatees went extinct?

What Would Happen If Manatee's Went Extinct? ... Without Manatee's to eat large quantities of sea grass, the vegetation would become obstructive to Florida Waterways. By limiting vegetation growth they control mosquitos population and overgrowth. Manatee's do not harm any other organisms and have no immediate predators.