The Tanatuvans are a humanoid species. Continuous organ transplantation led to the Plague-infected Tanatuvans having a wide variety of alien organs and skin on their body, resulting in a hideous appearance. When uninfected with the Plague, the Tanatuvans have a standard humanoid appearance. The Tanatuvans' facial appearance was similar to that of a Human with two eyes and nose and mouth, but they also possessed a swept back hairline and a slightly enlarged forehead with no eyebrows. There was also a slight ridge that ran from the hairline down the center of the forehead to the top of the nose.