Slivilith

The slivilith were a species of large, green, non-sentient creatures originally created by the Yuuzhan Vong as a long-range intelligence gathering device thousands of years before their eventual invasion of the galaxy. Fearsome predators with little mind of their own, slivilith could travel immense distances across the vacuum of space in a sort of hibernation state before awakening on re-entry into a new atmosphere, after which it immediately sought heat. Although they frequently appeared in popular entertainment, slivilith were often considered myths by the galaxy at large. Only four encounters with slivilith had been confirmed by the time of the Galactic Civil War, including a battle between a slivilith and a team of Rebel operatives on Arbra in 3 ABY.

Text and facts from the “Slivilith” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.