As with most achievements in this game, make sure you save before going to your final needed event/item. In this case, the last fish. If your achievement doesn't pop, restart the game and try it again.Pay attention to the kind of fish and their size in the pond.
Fish come in three sizes: small, medium and large, but there's a catch!The longer you fish, the bigger they get.
So, let's say that you want a Flying Fish (smal and night only). Exit the fishing game, draw the moon, and talk to the fisherman to start fishing again with small fish in the pond. Do not draw during the game.
In the spread, fish have their sizes to the right of the name: (S) for small, (L) for large, all others are medium.
I created a tracking list so it would make everything easier for me and decided to share it. Feel free to save a copy.
You can sort it byFish | Daytime | 1st Location | 2nd Location | which one you have | and where to sell it
Link to the spreadsheet: https://goo.gl/6DakvkVersion 2022: fixed most (if not all) prices and added the size.
Preview:
@illdizzog
pointed out this tip to complete the guide: Day and Night cycles continue as you fish. Therefore if you are going for a specific day or night fish you can draw a circle or crescent whilst fishing to keep whatever condition you need present. Thanks, illdizzog!