Arrghus (A Link to the Past)

Arrghus is a boss found in the Swamp Palace of the Dark World from The Legend of Zelda: A Link to the Past.

Arrghus is jellyfish-like creature that surrounds itself with cotton ball like enemies. Arrghus also has a giant eye in the middle of the body. To overcome Arrghus, Link must remove the puffballs using the hookshot found within in the dungeon. When the puffballs are removed, Arrghus's eye becomes vulnerable. After Arrghus is defeated, Link receives a Heart Container and frees the maiden from her crystal.

In a hidden dungeon, Link must face Arrghus again, although the creatures surrounding it are now infused with electricity, making the battle much more difficult.

Video
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Etymology
In Greek mythology, Argus was a cyclops, a giant distinguishable by its single central eye. Aside from this feature, Arrghus and Argus have little in common; however, it is likely that the former is named after the latter.