The Kreel are a space-faring humanoid race of primarily scavengers. They have frequently come into conflict with the Klingons since the 23rd century, due to their habit of picking at the remnants of Klingon defeats or victories after the Klingons have departed; they have been compared to jackals. In 2346, Kreel scavengers went through the wreckage of the Khitomer Massacre. In early 2365, the Kreel discovered a stash of advanced weaponry on an uninhabited planet and began attacking Klingon ships with them. The USS Enterprise was called in to mediate the dispute. (TNG novel: Strike Zone)