Eyexierkhar require a specific mixture of chemicals and elements in the air they breathe to survive. This composition exists only on Eyexierkhar and planets they have colonized. For any other race that breathes, this mixture is toxic and will result in death.
In torso and limbs, Eyexierkhar have thick flesh. Covering this significant amount of body mass are layers of porous, flaky skin. It is almost scaly in its consistency. The different layers of skin each have their own color, so the Eyexierkhar are patchy in their complexion. Their skin sheds and regrows constantly.