Hydroid Medusas were massive jellyfish cyborgs combined with armor and other cybernetic enhancements developed by the Karkarodons on their homeworld Karkaris. Hydroid Medusas were used by Karkarodon Confederacy of Independent Systems Commander Riff Tamson during the Battle of Mon Cala.
- Star Wars: The Clone Wars – "Water War" (First appearance)
- Star Wars: The Clone Wars – "Gungan Attack"
- Star Wars: The Clone Wars – "Prisoners"
- Star Wars Helmet Collection 25 (Databank A-Z: Hydroid Medusas–Imperial Academies)
- Star Wars: Alien Archive (Indirect mention only)