The Kloros are a spacefaring species of chlorine-breathing, colonial insectoids which at some point in their history made contact with Humans, resulting in a war between the two species. Physically, they resemble large insects with a long, slender neck and a diminutive head containing a somewhat triangular-shaped proboscis and a pair of huge bug eyes. The brain, or the structure which acts as a brain, is located in the abdominal area, so that the head acts mainly as a support for the sensory organs and a decapitated Kloros will remain alive until presumably dying from inanition. Kloros are about as tall as a man and have a number of small tentacles protruding from their chest. Their blood is green. They breathe chlorine and oxygen is deadly for them.