Riff Tamson was a Karkarodon male from the planet Karkaris. Tamson served as a commander and warlord for the Confederacy of Independent Systems during the Clone Wars and was placed in charge of operations on aquatic planets such as Mon Cala. When Count Dooku tasked Tamson to disrupt the fragile peace between the Mon Calamari and the Quarren, Tamson conspired with Quarren chieftain Nossor Ri to bring the Quarren into the war on the side of the Confederacy and the Quarren Isolation League. While on the Mon Cala, he assassinated the Mon Calamari king, Yos Kolina.