Karkarodon/Legends

Karkarodons were a species of sentient aquatics. Some, like Riff Tamson, supported the Confederacy of Independent Systems during the Clone Wars.

Biology and appearance
Karkarodons had tall bodies with webbed hands and feet. Their shark-like heads had pointed noses, slits, and many rows of razor-sharp teeth, which they used when attacking. Karkarodons were fast swimmers, with Separatist Droid Army, commander Riff Tamson being able to keep up with a Republic OMS Devilfish sub. They attacked by grabbing the target with their jaws.

History
In 21 BBY, during the Clone Wars, Separatist Commander Riff Tamson led the Confederacy during the Battle of Mon Cala. Later, another Unidentified Karkarodon was shown at the Republic Judiciary Central Detention Center who provoked Rako Hardeen (Obi-Wan Kenobi in disguise) and got his hand stabbed with a fork.

Behind the scenes
Carcharodon is the name of the genus that includes the great white shark.