Crab glider

Crab gliders were a carrion-eating species native to the gas giant Bespin. When predatory flocks of velkers attacked and fed on giant beldons it attracted crab gliders, which fed on the beldon's corpse until it began drifting toward Bespin's toxic planetary core.

Behind the scenes
Crab gliders were first mentioned in Ultimate Star Wars, a reference book released in 2015.