Glowworms (also styled as glow-worms) were bioluminescent worms native to the Coruscant underworld and the underground caves of Vjun. A typical glowworm had a size roughly equivalent to a loaf of Jawa bread. The Giant walking fish species had a preference for consuming glowworms.
While on a quest to locate Phelon, Chewbacca and one of the Rebel champions—either Luke Skywalker, Han Solo, or Leia Organa—received glowworms as a gift from winged aliens. The individual accompanying Chewbacca was compelled to consume one of the glowworms to satisfy their new friends, imagining that it would be delicious when paired with Tatooine Thunder sauce.