Arrghus' body is protected by small Arrgi that float around its body. Link must use the Hookshot, which is found in the same dungeon, to pull the Arrgi away from the boss and attack them with the sword. You must repeat this process until all of the Arrgi have been defeated. During the second phase, Arrghus will jump 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. This is when he is vulnerable to sword strikes.