Fisho

Fisho(AKA Fisho the Colossal Ice Dungeon Boss) is a Giant Fish monster and the final boss of the Ice Dungeon.

Appearance
Fisho is a giant Fish Monster with one giant eye, three mouths, and one big chainsaw on her back.

Death
Fisho died when Finn eviscerated her, and Ice King broke her chainsaw, which caused her to explode.