They are a tribe gone wrong. They hide in trees. If you struggle, you will die through ritual and suffer dearly. First, they will ambush your family and friends and take them to where you are and rip their eyes out of their sockets. Then they take the eyes and force-feed them to you. If you refuse to eat, they cut off their toes. If you still refuse, they will pull your eyes out and feed them to you. Then they will cut your feet and hands off and throw them to the sharks. When they have finished with most body parts, they will bite you just below the belly button. Then the transformation will begin.
Your eyes will lose their shine, and your nails will turn hard, long and sharp. It will feel like you are going to explode, your ribs will burst out of your chest and your stomach will turn. Your muscles will grow, and so will your arms and legs. Nose and mouth will turn to snout, and your forehead will sink back into your skull. Then comes the hair, short and coarse, all over your body. Your memory of whom and what you were will fade and you will be a new creature.