Yeerks
The Yeerks are a fictional alien species from the Animorphs series of young adult books by K. A. Applegate. They are slug-like creatures that possess the ability to enter the brains of other living beings, taking over their minds and bodies. This process, known as infestation, effectively turns the host into a slave, erasing their personality and free will. Yeerks reproduce by laying eggs and require a constant supply of new hosts to survive and expand their empire.
Yeerks originate from the planet Eask, which was destroyed by a galactic war. They are a highly