The Immortal Crustacean 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 Immortal Crustacean is based on real-life crabs. It possess golden armor on its wrists, upper arms and legs. Its lower legs, arms, and claws are red in color. Its face glows brightly with a yellow hue. Players can consume The Immortal Crustacean to restore 200 health points. If the player has no purpose for The Immortal Crustacean, it can be sold for 100,000 gold.
- Despite the Immortal Crustacean being "Immortal", players are still able to consume the crab.