Oh I completely forgot I could change the bait! Oops, didn't realize that until I saw the page's instructions and remembered. In my play through I hit an error when encountering the boss. I know it was the boss because it gave the following error:
Error
fishingsystem.lua:890: attempt to perform arithmetic on global 'horrorLevel' (a nil value)
Traceback
[love "callbacks.lua"]:228: in function 'handler'
fishingsystem.lua:890: in function 'triggerFishmanBossEncounter'
fishingsystem.lua:845: in function 'completeCatch'
fishingsystem.lua:349: in function 'update'
main.lua:172: in function 'update'
[love "callbacks.lua"]:162: in function <[love "callbacks.lua"]:144>
[C]: in function 'xpcall'
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Here's a link to the recording I made of the play through: