The Tachrani were an ancient species that evolved on the planet of Tachran. Adults averaged 1.65 meters tall, with males typically a decimeter taller than females. Although Tachrani tended to be very thin, they weighed even less than their visual appearance suggested, due to having light, hollow bones and porous muscles. A typical 1.6m adult female might appear to weigh 45 kilograms, but her actual mass would be closer to 30kg.