The Spinoledon is an aggressive melee mob that spawns in the Precasian Underground Dens. It is a Hunter mob that can only be damaged if the player is level 59 or higher, and grants 240 hunter experience points when killed. It applies Weakness III for 1 second when below 60 (×30) health. If the player's health is below 50%, it does 12 (×6) damage.
- The Spinoledon strongly resembles an Iosaur with Spinosaurus/Dimetrodon/Ouranosaurus traits.
- Curiously, it somewhat resembles a totally diferent prehistoric animal: the Lotosaurus