Bactricans were a civilization native to the planet Bactrica. Bactricans were humanoid, with facial features similar to Humans of Asian descent. While females are typically shorter than males, there was little visible difference between the two genders. A small percentage of Bactricans, known as "thirds", were neither male nor female, but were necessary to enable the procreative process (see Bactrican Triad). (DS9 - The Lives of Dax short story: "The Music Between the Notes")