Reverse engineering has disproved any pattern in Fertile money tree.
Fertile tree ratio is 30 - 70.
30% of cases (random) you get 3x what you planted (up to 99k x3)
70% of cases (random) you get 3x 10k if you planted at least 10k

You could gamble and get 99k x3, but the odds makes that average return only gets lower if you put more then 10k in the hole. You can ask Ninji to confirm

Seems that you put in your fish/bug data that Souther Month are the opposite of Northern month.

That lands true for fish/bugs that are available for 6 month, but wrong for all other cases.

It should be offseted by 6 months (plus or minus doesn't change anything).

Suckerfish for example is June to Sept Northern, but October to May Southern in your dataset.
Where it should be December to March.

Same seems to applies to all Southern data

Add sort options in the fish and bug list :

• ordered as in the critterpedia (without availability groups) for easy initial input
• orderd by decreasing price, to help decide what to keep and what to release

Add localisation to the fish / bugs / fossil names for people playing the game in their own local instead of english.