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 Mon Cala, he assassinated the Mon Calamari king, Yos Kolina.

Riff Tamson first appeared in each episode of a three part arc that started the fourth season of the Star Wars: The Clone Wars television series in 2011. The first episode he appeared in was «Water War,» followed by «Gungan Attack,» and finally «Prisoners» in which he was killed. In all three episodes he was voiced by Gary Anthony Williams. Tamson’s death was a homage to the 1975 film «Jaws,» in which the titular shark is killed when Chief Martin Brody shoots an air tank lodged in the creature’s jaws. When designing the model for Tamson, the Clone Wars animation crew made sure to rig his feet so that they could bend in order to suggest that his species could walk on land and survive out of water.