Mutations - Fish an Anime RNG Wiki
What mutations are, how they change a catch's value, and how to increase your chances of landing one.
Overview
Mutations are rare variants that appear on top of a normal catch, multiplying its value and sometimes adding visual effects. A mutated uncommon can out-earn a plain rare, which makes mutations one of the most efficient upgrades in the game.
How Mutations Work
Every catch rolls a separate mutation chance on top of its rarity roll. When the mutation roll succeeds, the catch gains a multiplier — the community reports several mutation strengths, with stronger ones being far rarer.
The multiplier applies to the catch's base cash-per-second value, which means mutating an already-strong catch is worth more than mutating a common one. That is why high-tier catches are the ideal mutation targets.
Reported Mutation Tiers
Community data suggests mutation strength falls into tiers. Exact numbers shift between updates, but the ordering is consistent.
| Tier | Relative Odds | Value Effect |
|---|---|---|
| Standard mutation | Uncommon | Small multiplier |
| Strong mutation | Rare | Medium multiplier |
| Ultra mutation | Very rare | Large multiplier |
| Secret mutation | Extremely rare | Top value |
Maximizing Your Mutation Odds
You cannot force a mutation, but you can make every cast count toward one. This setup gives the best practical odds.
Fish your best pond
A mutation on a high-tier catch is worth far more than on a common, so roll where the base values are high.
Keep luck fully stacked
Luck affects rarity, and mutation rolls piggyback on every catch — more rares means more chances at valuable mutations.
Maximize casts per session
Short minigame completions and zero downtime give more rolls per booster window.
Check every catch before selling
Mutations can hide in plain sight. Inspect duplicates for variant markers before you sell them.
How to Spot a Mutation
Mutated catches usually stand out if you know what to look for.
- A visual aura or particle effect around the character
- A different name color or rarity badge in the inventory
- Higher cash-per-second than the same character normally has
- Collection screen flags or variant markers
- Community calls for screenshots after unusual pulls
Mutations vs Other Boosters
Mutations stack with every other system — here is how they fit into the wider economy.
Mutations
Per-catch value multipliers from a second RNG roll.
Relics
Account-wide stat boosts that lift every placed catch.
Rebirth
Global multipliers that multiply mutations again.
Should You Hunt Mutations?
Actively hunting mutations is usually a side goal, not a main strategy. The rolls are rare and uncontrollable, so the efficient path is farming normally and treating mutations as welcome surprises.
The one exception: if a mutation tier multiplies high-tier catches, a dedicated boosted session at your best pond is a reasonable gamble once your farming loop is already stable.
Frequently Asked Questions
What is a mutation in Fish an Anime RNG?
A rare variant roll that multiplies a catch's cash-per-second value and usually adds visual effects.
Can any catch mutate?
Yes, any rarity tier can roll a mutation, though valuable mutations on high tiers are the real prizes.
Do mutations affect collection progress?
Yes, mutated catches are tracked separately in the collection and count toward completion bonuses.
Can luck potions increase mutation odds?
Indirectly — luck raises rare catches, and mutation rolls happen per catch, so more rares mean more opportunities.
Should I sell a mutated common?
Compare its income with your base average — mutated commons can still beat plain rares early on.
Are secret mutations real?
Yes, mutations can roll on secret fish, making them the single rarest catch combination in the game.
How do I farm mutations efficiently?
Fish your best pond with full boosters and maximize casts per session — volume and quality together.