Quite relaxing game.
I enjoyed having a fishdex, to look for what I'm missing. Makes it fun. I would actually load that screen after fishing, to show the player where that fish falls in the index. Perhaps some text blinking on the affected entry.
The music was too high-pitch to my taste. After a while, it gets tiring.
The spinning part could improve if you slow it down so the player can read the text. Instead of stopping at once, so a small slowing down, like a roulette. That would make it attracting to the eye.