To get a leech off of you, you need to create a fire and jump on the fire for a few seconds until the leech dies

FOR MOBILE PLAYERS ONLY:
These are in the swamp, they’re just super rare and you rarely will find them. They must be removed via campfire or cooking pot, same thing applies to dinos that aren’t native to the swamp.
FOR MOBILE PLAYERS ONLY:

On the island there’s many outbreaks of “swamp fever”. You get Swamp fever by getting a infected leech stuck on you and TRANSFERRING NO longer Gets RID of SWAMP FEVER.

No latch onto Beelzebufos

I read on the ark wiki that they dont latch onto tames native to the swamp

For those of you who think leeches aren’t in mobile you can find them in swamps I have seen three they are in the water you can see them going thru the ground if you get one stuck to you just build a campfire and stand on it!

dont touch the red ones. red = no

Be careful if you see a red leech. It is diseased and will give you a debuff which reduces health, stamina, speed and some others. the way to cure it is with lesser antidote

Fire doesn’t work to remove leeches anymore. Go to a tamed animal, open command wheel and click “hold to remove leech.”

WATCH OUT THEY GO ON LAND AND WIGGLE