The Mopoks are a race of primitive sentients native to Rostov III. They are technologically capable of creating primative huts, clubs and spears.
The Kilrathi attempted to enslave the Mopoks and exploit Rostov's natural resources in 2654, but were forced to flee the system once engaged by the TCS Tiger's Claw. During the Kilrathi evacuation, the Mopoks were successful in capturing a handful of Kilrathi Marines.
Source: WC CIC Encyclopedia