The Marmakas are a sapient species whose bodies are radioactive. They are also known throughout the galaxy for being excellent psychologists, and are one of the races present in the multi-species space station Point Central.
- Valérian and Laureline - Ambassador of the Shadows (1975)
- The Inhabitants of the Sky: The Cosmic Atlas of Valérian and Laureline (1991)
- Valerian and the City of a Thousand Planets