Random thought about the fish size:
Do you think it matters how often the fish can "expand" the closing circle before being caught?
Meaning if you can keep the fish centered all the time, you get a bigger one? I doubt it is true, becaue I think I caught some easy fish in first try and didn't catch a gold sized fish so far.
As said, just a random thought, feel free to discard or confirm.
Congrats on all your gold sized fish, Isabella!
The notes I took are only semi relieable, because at first I didn't pay attention to the circle size...