It would be useful the player book provided information about where a fish was and what lure it liked.
This information would be granted to you only when you do certain things that the fish likes:
Lure type: When you catch a fish with the lure it likes.
Type of weather: Catch a fish while under the correct weather conditions.
And so on
Or
Have scrolls around the world to give that information.
I see a section in the player book that provides “information” about each fish (weight and amount). So, it would be cool if more was added to it.