Seelos was a desert planet, located in the Seelos system of the Outer Rim Territories. The world was covered in salt plains and mountains, and it was home to large plated, worm-like creatures known as joopas. The world was also home to Captain Rex and Commanders Wolffe and Gregor during the Age of the Empire.
- Star Wars Rebels – "The Lost Commanders" (First appearance)
- Star Wars Rebels – "Relics of the Old Republic"
- Star Wars Rebels – "A Fool's Hope"
- Star Wars Rebels: Visual Guide: Epic Battles (First identified as Seelos)
- Star Wars: The Visual Encyclopedia
- Star Wars: Absolutely Everything You Need to Know, Updated and Expanded
- Star Wars Encyclopedia of Starfighters and Other Vehicles