Although populations have been much reduced in most areas, there are probably still many thousands. They can probably live to be at least 50 years old. He was born in an aquarium in Miami in the late 1940s. In an aquarium, manatees are fed mostly romaine lettuce, which is similar in composition to the plants they consume in the ocean. In fact, manatees are unique in being the true herbivores of the marine mammals.
Twins are rare but they do happen.
The longest one on record is just over four meters long. The heaviest one weighed 3,500 pounds. The ancestors of manatees are about 50 million years old. Some avoid people. The best way to catch them is with a big net, which works very well.