Blackstalker

The Blackstalker was a genetically-engineered offshoot of the Garral created by Imperial scientists expanding on the work of Luthos Garral. The Galactic Empire intended to use them to assist Human scouts and guard patrols, but they proved to be very aggressive and nearly impossible to train. Their creators attempted to destroy them before they were put into service, but many managed to escape on outbound starships.

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