Space worms were gigantic creatures—capable of surviving in space—which fed on minerals. They were responsible for hollowing out Eskaron, a moon in the Cularin system, but due to this they exposed Eskaron's molten core, which expanded, destroyed the atmosphere and killed some of the worms. When the worms used up their food source, they moved on from the system millennia before it was discovered by Reidi Artom.
The remnants of one worm was found in Eskaron and called simply the Worm.
- Living Force Campaign Guide (First mentioned)