Fishy Stuff
Fish Groups Explained
by Karpfen
Overview
There are several possible groups to obtain fish from when you catch a fish
| Name | Typically contains (with exceptions) |
|---|---|
| General | Green grade fish / Plump Coelacanth / Glass Bottles |
| Big | Blue grade fish |
| Rare | Yellow grade fish |
| Prize | Red grade fish / Relic Shards / Troll 1% Mudskipper |
| Treasure | Silver & Gold Keys / Relics / Laila’s Petal |
Big Fish
Big fish are typically blue grade fish.
You can affect their rate with the following methods:
| Item | Group Bonus |
|---|---|
| Ash Tree Float | +11% |
| Whaling Lightstone Set | +6% |
| Calpheon Fishing Rod | +11% |
Rare Fish
Rare fish are typically yellow grade fish.
You can affect their rate with the following methods:
| Item | Group Bonus |
|---|---|
| Maple Float | +5% |
| Sharp-Eyed Seagull Lightstone Set | +5% |
| Mediah Fishing Rod | +5% |
| Palm Tree Float 🌴 | +5% |
| [Event] Wise Housekeeper | +5% |
| [Event] Crispy Goldfish Delight | +5% |
Prize Fish
Prize fish are typically red grade fish, but unfortunately often also Ancient Relic Shards.
Prize fish can only be obtained via Lifeskill Mastery.
Theory
Personally I believe there are essentially two rolls:
- First it rolls for the fish group (% determined as seen in the image always normalized to 100% )
- Then it rolls within that group for the actual fish itself
I believe the game does NOT roll prize fish first, or use a “Roll-Down” Method from all we can tell.
Data
Empirical data for this was collected by
For my own testing i used a consistent setup of 1600 mastery = 4% expected prize rate with +10% chance to catch rare fish. The actual observed prize rate was only 3.55% in 33.6k samples. At 99.9% confidence this means the actual rate lies in between +- 0.33% of the observed 3.55%. (So at best 3.88% which is below 4%).
Another ~9.4k samples were collected by shrddr with +11% big float at 1900 mastery which resulted in 4.07% vs. 4.75% expected.
Negative samples (no fish modifiers) were collected by shrddr which resulted in
- 4.55% vs. 4.75% expected at 1900 mastery (17576 samples)
- 4.72% vs. 4.625% expected at 1850 mastery (10901 samples)
Confirmation
According to one Korean player who presented this theory and asked for clarification, they received a response from Korean customer support confirming that increasing one group’s rate means decreasing the rate of another group.
Arguably the translation and or response aren’t 100% clear but it at the very least confirms that prize fish rate is impacted by increases in other group rates.