The Idryll are an amphibious humanoid species. The Idryll possess physiology common to amphibious species, including low light vision and excellent swimming skills. They stood an average of 1.8 meters, had smooth green, blue, or brown skin and large, lidless, black eyes. Idryll possess exceptional olfactory and pheromone sensing skills, enhanced by head-tresses. These tendrils were used to detect the emotional state of another being, but were most effective underwater.