Gigauns were enormous, yet harmless, creatures native to the planet Ukio. They were also known as hatchet heads by the local workers. They were essential to Ukio's ecosystem, as they possessed subsonic cells within their bodies which caused seeds to germinate, as the gigauns moved along their migration routes.
During the Clone Wars on Ukio, when the Separatist tactical droid Doctor launched the second phase of Project Instinction, herds of gigauns wandered off their normal paths and near the fields of crops, threatening to crush them beneath their feet.
- The Clone Wars: Act on Instinct (First appearance)
- The Clone Wars: The Valsedian Operation (Mentioned only)