Planet: name unspecified. A sentient, space-faring species of hydrogen breathers capable of inhabiting Class-M environments with adaptive gear; otherwise unspecified but apparently of Alpha or Beta quadrant origin. The species was known to Curzon or a previous Dax host, since Jadzia talked of a Lothra who mated with an oxygen breather for 57 years. They could only spend 40 minutes a day together without their breathing apparatus.