Saarl, sometimes referred to as Rift Worms, were enormous creatures resembling worms, and they originated from the planet of Tython. These terrifying animals had huge mouths that they utilized to consume their victims. Usually, individuals avoided confronting these creatures, opting to flee instead.
After the Je'daii were moved to Tython by the Tho Yor, they came across these animals. Je'daii Master Quan-Jang, along with his student Shae Koda, tried to capture one of the worms. Even though they survived the ordeal, the creature nearly killed them. When Xesh, the Force Hound, crash-landed on Tython, the incident triggered a potent Force Storm to erupt, enabling a Saarl to generate Force lightning because of the event. This particular Saarl tried to eliminate Xesh, leading to a battle involving Sek'nos Rath, Shae Koda, and Tasha Ryo.