Cute game! chill vibes! I did not end up going for collecting 1000 coins. The shark's on-target reward versus off-target punishment is absolutely ruthless, I easily caught everything smaller than it but it immediately peeled itself off all three times I found it (I did find it with heron bait, and I "won" when it ran off with the special bait, which I am assuming IS intentional, given it's dynamite)
It's just a really big jump in reward versus punishment, you need to have an on versus off target ratio significantly higher than any other fish demands, to theoretically catch the Great White.
(Also, the text is not quite pixel-perfect. It's nearly there, but the blocks of text are slightly offset from the pixel grid, and there is a slight sub-pixel-sized gap between each row of text...)