Sembla, previously called Utavurk, was a planet situated in the Outer Rim Territories' Mahrusha sector. It served as the homeworld for the Vurk species, notably including Jedi Master Coleman Trebor. The planet Sembla possessed four moons, resulting in significant tidal and tectonic activity, and its surface consisted of numerous shallow seas and volcanic islands. Due to its remote location, far from significant trade routes, Sembla was infrequently visited. Despite this isolation, the Galactic Empire built a research facility there and forced the indigenous Vurk to work for minimal pay in strip-mining activities.
The creation of Sembla occurred for "Who's Who in the Jedi Order," a Star Wars Legends piece authored by Greg Keyes alongside David West Reynolds and featured in Star Wars Insider 62 during 2002. Its inclusion into canon came with the publication of Ultimate Star Wars, a reference book that came out in 2015.