Manatees are a gentle giant and most the time they don't need to protect themselves Manatees have no natural predators only humans they can't stop a boat from hitting them so your answer is they don't protect themselves other than moving away from danger.
They roll up and blind in with plants
swip there tails againght shark and other predors
Don't drive in low coastal ares.
They are protected by both the state and federal law in Florida.
They protect themselves by squirting ink.
manatees have a third eyelid ,which is clear, to protect it from water getting into it.
They have a layer of blubber to keep themselves warm.
Citizens protect themselves with police departments. Nations protect themselves with a military.
they use their sting tail to protect themselves
how do lionfish protect themselves
Barnacles protect themselves by sticking to something sturdy.
no, they protect themselves XD I have to laugh at that, but it is true they protect themselves.