Gouka Dragons are immense, subterranean organisms inhabiting their homeworld of Aargonar. Through the use of high body temperatures they can create tunnels of fused rock where they will spend the entirety of their existence. They are known to prey on Sarlaccs, yet seemed uninterested in feeding upon smaller species, making it most likely that they evolved to specialize in feeding upon that one organism. For unknown reasons, they could be attracted by engine noise. The phrase "your secret will eat at you as a Gouka Dragon gnaws through a planet's crust" references this being.