The Xi'Dec represent an insectoid sentient species originating from the world of Stic. A notable individual from this species was Ubbla Mollbro, a female opera performer distinguished by her swollen egg sacs.
During the era of the New Republic Era, Captain Carson Teva disseminated the survival guide titled "Species From A to Z," which featured an entry dedicated to the Xi'Dec species. Around the year 9 ABY, a female Xi'Dec named Bubbles was recorded as a guest at the Skull Ridge Mountain Hotel & Spa, situated on the planet Lanupa. The celebrated opera singer Ubbla Mollbro also frequented the locale of Canto Bight on the planet Cantonica, seeking a suitable mate.
Within the context of Star Wars Legends, the Xi'Dec were initially detailed in Galaxy Guide 4: Alien Races, a supplementary resource for Star Wars: The Roleplaying Game. This guide was authored by Troy Denning and released by West End Games in the year 1989. The species' inclusion into canon occurred with their appearance in the sequel trilogy motion picture, Star Wars: Episode VIII The Last Jedi, which premiered on December 15, 2017.
In Legends continuity, the Xi'Dec possessed a remarkable diversity of at least 180 distinct sexes and engaged in a multitude of reproduced methods. It remains uncertain whether this characteristic holds true for the canon Xi'Dec, or whether they all share Ubbla's biological traits and propagate through the laying of eggs.