- This article is about the boss of the Swamp Palace in A Link to the Past. For similar bosses, see Arrghus (Disambiguation).
Arrghus' body is protected by small Arrgi that float around its body. Link must use the Hookshot to pull the Arrgi away from the boss and attack them with the sword. He must repeat this process until all of the Arrgi have been defeated. During the second phase, Arrghus jumps into the air and off from the visible area of the screen. Upon landing, the water splashed will damage Link if he comes into contact with it. After landing, Arrghus will move around the room, being vulnerable to Link's attacks. Once Link has defeated Arrghus, he is rewarded with a Heart Container and the Second Crystal.