The Riverlord 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:
In appearance, the Riverlord Fish is a royal blue fish with a set of three purple cube-like objects above its head. A series of red fins can be seen going down its upper body, as well as a pair of light red fins to the side of its head. Players can consume the Riverlord Fish to restore 100 health points. Players can also exchange a Riverlord Fish for 75,000 gold during the Slayer's Tasks. If the player has no purpose for the Riverlord Fish, it can be sold for 25,000 gold.