|The following information is from the Adventure Time comic book series. It may not be part of the same canon or continuity as the animated series.|
Fisho the Colossal is the dungeon boss of Ice King's Hall of Just Ice. She is giant fish monster with a one giant eye, three mouths and a chain-saw on her back. She is killed when Finn eviscerated her and Ice King ripped off her chain-saw, which caused her to explode. She was created by Ice King to guard his treasure, which was a picture of him and Betty.