These creatures were used by Naga Sadow as tracking devices.
The Sith Tracking Device Creature was used by Naga Sadow to follow Starbreaker 12 to the Republic from Khar Shian. This in turn led to the war of Coruscant, Koros Major, Kirrek and the first battle of Korriban. The device was a froglike droid/animal which let off a homing signal.
Behind the scenesEdit
While they are canon, these creatures were never actually named.