The manatees are not extinct, though they are classified as "vulnerable".
Yes there are people helping to clean up manatees water. You can help by picking up trash in the water and on the ground. Picking up trash on the ground is important because it can eventually go down a drain and lead to water which then sinks to the bottom of the water of a manatees habitat there fore by picking up trash you can hep manatees and save them from extinction.
join clubs
One method that saves the extinction of manatees is: Manatees like shallow water because food is plentiful there. Where there are shallow waters, there are boats also. Most parts of the bodies of water in Florida are inhabited with manatees, so the areas that are most inhabited by manatees will be closed down to ships and boats, who are likely to go over them, and even kill them.
Manatees have no defences, save the thick blubber that covers their body.
start the emperor tamarin refuge center
help start a program to save them, have a sponsor or something get help from a wildlife foundation.
save a species from extinction.
Here are some links that explain what is being done to save the manatees.
If you live in Florida or somewhere manatees live, you can put up signs and posters, and if you sometimes travel by boat, try to tell the driver to go slowly so as not to run over the manatees. If you're living someplace where manatees don't live (like Iraq, North Dakota, etc...), you can invest money to websites that save animals from extinction.
All three species of manatee are listed by the World Conservation Union as vulnerable to extinction.
I am in the Save the Manatee Club. When you adopt a manatee, they take that money and use it for research and stuff to prevent manatee deaths and stuff like that. I would check another source too to make sure the info I am giving is correct.