He once caught the Loch Ness Monster but threw it back when it asked him for tree fiddy.
His catches include:
Nope Fish
Kraken
Leviathan
Red October
Megalodon
Moby Dick
Whatever caused the Bloop
Godzilla
Jesuszilla
The Bermuda Blob
Ogopogo Monster
The monster from Deep Rising
A real mermaid
A fake mermaid