Jellyfish were soft-bodied marine invertebrates with a gelatinous umbrella-shaped bell and long-trailing tentacles. One known species of jellyfish were the cyborg Hydroid Medusae, which were created by the Karkarodons of the aquatic planet Karkaris. Hydroid Medusae were deployed in large numbers during the Battle of Mon Cala during the Clone Wars.
- Star Wars: The Clone Wars – "Water War" (First appearance)
- Star Wars: The Clone Wars – "Gungan Attack"
- Star Wars: The Clone Wars – "Prisoners"
- Kanan 4: The Last Padawan, Part IV: Catch
- "Endangered, Part 2"—Star Wars Adventures 8
- Doctor Aphra 19: Remastered, Part VI (Mentioned only)
- The Legends of Luke Skywalker (Mentioned only)
- Forces of Destiny: The Rey Chronicles (Mentioned only)
- Star Wars: Forces of Destiny – "Shuttle Shock"