This is a "smaller" update and apologies it's a day late. I will include the chance of the different fish tiers spawning.
Added 6 new fish, so every area now has 6 fish each
Adjusted some fish difficultys
Fish Spawn Chances (roughly)
Tier 1 - 25%
Tier 2 - 25%
Tier 3 - 21%
Tier 4 - 21%
Tier 5 - 7%
Tier 6 - 1%
The rarest fish are 1% but I was able to catch them without too much effort. They also aren't too hard because I thought being rare and hard would be unfair.