Mythical Mutation in Fisch5.5x
The fish glows and keeps cycling through rainbow colours.
Last checked against the Fisch Wiki on October 29, 2026.
How to Get Mythical
Buy the Mythical Rod when the Travelling Merchant has it: 30% of its catches are Mythical, for 90,000 C$. Fishing in Rainbow weather gives a 15% chance on any rod, and any catch has a tiny 0.04% chance.
Mythical multiplies a fish's sell value by 5.5x: a fish worth 1,000 C$ sells for 5,500 C$ with it. That is higher than 177 of the other 355 mutations with a fixed multiplier.
Every Way to Get Mythical
| Source | Chance | How to get it |
|---|---|---|
| Mythical Rod | 30% per catch; 35% with its Mastery enhancement | Buy it for 90,000 C$ when it is in the Travelling Merchant's rotating stock. |
| Rainbow weather | 15% | Any catch made while the weather is Rainbow. |
| Any catch | 0.04% | About 1 catch in 2,500. |
| Prismatic status effect | 3% | While the Prismatic status effect is on you. |
| Disco Dance, Hawaii Rebirth, Classic Commotion (admin events) | 50%, 10% and 9.09% | Only while those admin events are running. |
| Paintbrush (rod)No longer obtainable | 50% | A prize for an art contest in the Fisch Discord. |
| Lullaby (rod)No longer obtainable | 12% | A limited quest reward. |
| Appraisal | about 0.022% base chance | Pay the Appraiser in Moosewood to re-roll a fish you already caught. |
The Best Way to Get Mythical
The Mythical Rod is a cheap way to a 5.5x mutation if you catch the Travelling Merchant with it in stock. Whatever rod you use, fish through Rainbow weather when it comes.
Good to Know
- Mythical can land on crates, but shows no effect on them.
- Version 1.58.0 raised it from 4.5x to 5.5x.
How Mythical Changed
- Version 2.03.0: Hawaii Rebirth admin event added as a source.
- Version 1.90.0: Classic Commotion admin event added as a source.
- Version 1.89.0: Disco Dance admin event added as a source.
- Version 1.82.0: the Lullaby became a source.
- Version 1.58.0: multiplier raised from 4.5x to 5.5x.
- Version 1.31.0: Rainbow weather added as a source.
- Version 1.0: Mythical released with the Mythical Rod.
Similar Mutations
See every mutation and source in the Fisch mutations guide, or check what Mythical does to your own catch with the Mutation Hunter.
Frequently Asked Questions
How do you get the Mythical mutation in Fisch?
Buy the Mythical Rod when the Travelling Merchant has it: 30% of its catches are Mythical, for 90,000 C$. Fishing in Rainbow weather gives a 15% chance on any rod, and any catch has a tiny 0.04% chance.
How much is the Mythical mutation worth?
Mythical multiplies a fish's sell value by 5.5x: a fish worth 1,000 C$ sells for 5,500 C$ with it. That is higher than 177 of the other 355 mutations with a fixed multiplier.
Can the Appraiser give the Mythical mutation?
Yes. Appraising a fish has about 0.022% base chance of giving it Mythical (5.5x).
Source: Fisch Wiki, Mythical and the pages of each source above, checked October 29, 2026. Game updates can change these numbers.
