Gedd

Gedds are apelike aliens that live on the same world as the Yeerks. They were the first species to be mind controlled by the Yeerks. They are primitive and deformed (barely evolved), it is said that one leg is longer than the other. Only low-ranking Yeerks still have Gedd hosts, higher ones prefer to control a Hork-Bajir, Taxxon, Human, or Andalite.