The Z'gag was a river on the planet Ruuria. It was along its banks that the K'zagg Colony made its home. The waters of the river are described by the K'zagg song, "By the Banks of the Warm, Pink Z'gag". The tune is played at their cocoon-weaving time when the larvae are preparing to go chrysalis, and last cycle's cocoons open into chroma-wings.
- Han Solo and the Lost Legacy (First mentioned)