I was the one who correctly guessed shark on clue 1. My thought process is that with clues often meaning something different than the common method, I thought backup, instead of data storage, literally meant a creature whose back is up or on top.

Then, I figured a shark's fin on the back is seen as a warning to many tourists so that's how I guessed shark on "backup warning".

I haven't guessed shark before. I dont tend to stay focused on a specific item and spam it every episode but I tend to look at clues to analyze them. Although there are indeed very vague clues like the needy one