- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Origin: unspecified. By implication, an oxygen-breathing species 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 hydrogen-breathing Lothra who mated with an Oxygene for 57 years. They could only spend 40 minute a day together without their breathing apparatus.