Region: Outer Rim Territories
System: Castilon system
Primary terrain: Oceans
Points of interest: Colossus, Karavian Trench
Fauna: Rokkna, Sharvo fish, Snarlfish, Speagull
Native species: Chelidae
Immigrated species: Aleena, Arcona, Bith, Chadra-Fan, Frigosian, Gilliand, Gotal, Gozzo, Human, Ithorian, Kel Dor, Klatooinian, Lutrillian, Mirialan, Nautolan, Nikto, Kadas'sa'Nikto, Rodian, Snivvian, Sullustan, Theelin, Trandoshan, Troig, Ugnaught
Primary language(s): Chelidae language, Galactic Basic
Description: Castilon was an ocean planet located near Wild Space in the galaxy's Outer Rim Territories, and was the homeworld of the Chelidae species. The Colossus—an aircraft refueling station, as well as a destination for racers—was located on Castilon, along with several other inhabited structures. During the cold war between the New Republic and the First Order, Resistance Commander Poe Dameron sent the pilot-turned-spy Kazuda Xiono on a mission to Castilon. While Xiono was aboard the Colossus, the First Order managed to force its captain, Imanuel Doza, into allowing them to act as security, making way for them to occupy the platform and slowly take control. The Colossus was eventually forced to flee the planet in order to escape the First Order, rising from the ocean and jumping into hyperspace.
A planet covered in vast oceans, Castilon was located in the Outer Rim Territories, near the edge of Wild Space. Castilon's star system had one star, and the planet itself had two moons. It had an atmosphere that was breathable to the species that inhabited it, including humans.
It was home to the sentient Chelidae species, among many non-sentient creatures, including the sharvo fish, snarlfish, speagull and the massive rokkna. Many smaller creatures lived in the oceans of the planet, and were often prey of the larger creatures, such as the speagulls. While most of the planet was covered in ocean, there were occasional inhabited structures above the surface of the water.
During the Imperial Era, the Galactic Empire space station Colossus was operated as a super tanker fuel depot on the planet. The platform, which had rested on Castilon since 14 ABY, came to be owned by Captain Imanuel Doza, and fostered a vibrant racing circuit that became famous throughout the galaxy. By 34 ABY, Doza lived in the Colossus' tower with his daughter Torra, his droid assistant 4D-M1N and the pilots of Ace Squadron.
The Chelidae were an amphibious species native to the oceans of Castilon. Individuals of many other sentient species resided on board the Colossus, including the Chelidae, who worked as the platform's engineers.
The Colossus, an old Galactic Empire space station and super tanker fuel depot converted into a public refueling station, was one of the few inhabited structures on the planet, until it was forced to leave Castilon to escape the First Order. The Karavian Trench was located underneath the water, and was where Synara San salvaged a Z-95 Headhunter that contained the young rokkna Bibo.