The Calentar are a strange-looking bipedal race of beings that was native of Calen. The head of a Calentar appeared to have been stretched and bent like a ladle. The eyes were set at opposite sides of the hammer-shaped top portion of the head, and their mouths were hidden below on the sloping part of the head. They have wide, flat feet designed to help an individual keep their balance. They also had two throats, so the speaking voice of a Calentar came out with a weird stereo effect, and this biological phenomenon made their speech hard to understand. Their homeworld was one of the first planets to be attacked by the Fen Domar, few were killed and many escaped to Earth and other sections of the Galaxy.