"they are 3 foot tall bipeds weighing about 75 pounds who use their powerful arms for locomotion. their legs are vestigal and serve no purpose. they have large black eyes set at the top of their thin flat arrow shaped head. two long ears pertrude from the side of their head. These ears serve little purpose as their hearing is exceptionally bad. A ridge of small spines runs along the Thet's back. These are also useless."