Gouka dragons were immense creatures that lived underground on Aargonar. They used high body temperatures to create tunnels of fused rock in which they lived. They preyed on sarlaccs, but were uninterested in smaller creatures. They could be attracted by engine noise.
- Republic 59: Enemy Lines (First appearance)
- The Official Star Wars Fact File 133 (LIN2, Behind Enemy Lines)
- The New Essential Chronology
- The Complete Star Wars Encyclopedia