The Glow worm is a serpent-like dragon that lives in deep, dark caves and is very loyal to its owner. Its bioluminescent spine glows in the dark and aids the dragon in hunting in dark caves. They crawl on walls and sleep on ceilings. They breathe a soft flame that glows more than burns. The Glow Worm can also spew glowing sticky fluid from its nostrils to disorient its predators. It eats grubs and blind cave crickets that are found in or on Glowing Cave's walls.