The Mamathisk were a race encountered by the Ellimist in The Ellimist Chronicles. Ellimist managed to save them from themselves, though what they were doing that was leading them into extinction is unknown. He showed them how to live a productive life, were they lived in peace for sometime. However, Crayak came along and created a Plant Parasite that destroyed their crops. Without enough crops to feed the hungry Mamathisk, they quickly reverted to cannibalism. By the time the Ellimist learns this, the Mamathisk is just about extinct.