Twi'leks are an omnivorous humanoid species originating from the planet Ryloth. Their distinctive features include colorful skin, which varies in pigment from individual to individual, and a pair of shapely prehensile tentacles that grew from the base of their skulls. The tentacles, called "brain-tails," "lekku," "tchun-tchin," or "head-tails" are advanced organs used for communication and cognitive functions. Twi'leks are often used as slaves, the females primarily as dancers because of their beauty.
For information on this subject beyond The Old Republic, see: Twi'lek on Wookieepedia
