Selnesh was a prison operated by the New Republic, and it was the site where Gapgrin Dozito and Sart Juloss were incarcerated. Both individuals were serving 25-year terms for their failed shipjacking attempts. Marshal Carasynthia Dune viewed these sentences, noted in their profiles, while looking for information on the criminal Migs Mayfeld circa 9 ABY. She saw these profiles among others.
The name Selnesh was visible on a screen in "Chapter 14: The Tragedy," an episode of The Mandalorian, a Disney+ series by Jon Favreau. Robert Rodriguez directed the episode, which debuted on December 4, 2020. Within the Star Wars Legends continuity, the planet Selnesh, which functioned as a prison, initially featured in the short story "Do No Harm." Erin Endom authored this story, which was published in May 1996 as part of Star Wars Adventure Journal 10.