Ottethan, alongside Felucia and Dathomir, served as a homeworld for the rancor species, a group of semi-sentient beings; it was an astronomical body.
The young-readers reference book Star Wars: Creatures vs. Aliens, authored by Pablo Hidalgo and published in 2019, marked the initial mention of Ottethan within the new Star Wars canon. Originally, the planet Ottethan made its debut in the Star Wars Legends continuity back in 1992 through Dark Empire 3, which was the third installment of the Star Wars: Dark Empire comic books series penned by Tom Veitch.