The Theelin were a near-human species was nearly bred out of existence, by the time of the Galactic Civil War. They were native to the Hutt Space planet Wethic.
Their own genetic make-up became their downfall, as the union of male and female gametes often resulted in incompatibilities that doomed the tiny embryo. It was later discovered that Theelin individuals were more compatible with pure human stock, but crossbreeding was insufficient to keep the Theelin population alive. As a people, the Theelin race was noted for its beautiful musical works, although most of their most stirring works were written to lament the race's eventual extinction.