Hulgren were a species of snake-like creatures that could grow up to 40 meters in length. They were gray in coloration and had numerous eyes. They were found in the lower levels of the space station, Hosk Station.
- Star Wars Droids: The Kalarba Adventures 6 (First appearance)
- Star Wars Encyclopedia
- The Official Star Wars Fact File 25 (POL2, 501-Z Police Droid)
- The Complete Star Wars Encyclopedia