The Ancient Magma Fish is a fish that can be acquired in the Frontier. It can be found from various sources and locations throughout the Frontier including but not limited to:
- A very rare drop from a Magma Knight.
- A very rare drop from a Pine Giant.
- A possible reward from the Otherworld Tower.
- Being caught at Pit Depths.
In appearance, the Ancient Magma Fish is a large, maroon fish with fins that glow bright orange similar to magma. Players can consume the Ancient magma Fish to restore 150 health points. Players can also exchange an Ancient Magma Fish for 85,000 gold during the Slayer's Tasks. If the player has no purpose for the Ancient Magma Fish, it can be sold for 12,000 gold.