Morgo, a Selkath distinguished by his gray skin, lived during the era of the Clone Wars. In 20 BBY, a group of Trandoshan hunters took Morgo captive. He was then held as a prisoner on their prisoner ship, known as the Vermin-Thrax. Morgo was joined in captivity by the Sakiyan Vadoo, the Snivvian Katt Mol, and the Terrelian Jango Jumper Lika; the Trandoshans intended to hunt all of them for sport.
After the Trandoshans' abduction of Jedi Padawan Ahsoka Tano from the planet Felucia, she was also imprisoned with Morgo and the others. Subsequently, the hunters journeyed to the moon Wasskah and released the captives from the Vermin-Thrax onto the beach of an island below. From aboard the prisoner ship, Garnac, the Trandoshan leader, initiated the hunt by ordering the firing of the vessel's laser cannon at the prisoners, causing them to scatter. Morgo was killed by the laserfire as he attempted to escape.
Morgo's appearance occurred in "Padawan Lost," the twenty-first episode of Star Wars: The Clone Wars' third season, an animated television series. This episode was broadcast on April 1, 2011. Although the episode itself did not name Morgo, the StarWars.com Episode Guide identified him and revealed that his design was based on Chata Hyoki, another Selkath who had appeared earlier in the same season. The character model for Morgo was later repurposed as the foundation for Mantu, a Selkath featured in the show's fourth season.