Catlia was a world situated in the Catlia system, found inside Chiss Space in the galaxy's Unknown Regions; this planet was linked to Cormit via the Phalanx Route hyperlane. This world served as a remote settlement for the sentient Chiss species, and it housed a single one of the Ruling Families that governed the Chiss Ascendancy, which was the Chiss government.
The Ruling Family living there utilized groups of the sentient Killiks as laborers sometime before the year 28 ABY. That year, the Family fell from their position because of this, and its members were transformed into Joiners—individuals integrated into the Killiks' collective consciousness.
The reference book The Essential Atlas, written by Jason Fry and Daniel Wallace and released in 2009, was the first time Catlia was brought up; it was placed in grid square G-8.