How to Get More Mutations in Net a Fish (November 2026) Ultimate Guide

Mutations are the money-makers in Net a Fish — a mutated fish earns up to 2.5x its base income, turning one rare catch into a showcase jackpot. You get more mutations three ways: stacking mutation luck before every cast, fusing duplicate fish in the Fish Cooler, and fishing during mutation-boosting events. In this guide, I cover every working method in November 2026: exact fusion recipes from Shiny to Starlit, the upgrades, potions, baits and Index pages that raise your odds, the events worth waiting for, and the Pearl Shop tools that fix bad rolls. Here’s what each mutation is worth and how to get it:

Mutation	Multiplier	How to Get It
Shiny	x1.15	River catch, or fuse 10 normal fish
Gold	x1.25	River catch, or fuse 8 Shiny fish
Crystal	x1.35	River catch, or fuse 6 Gold fish
Glitched	x1.50	River catch, or fuse 4 Crystal fish
Rainbow	x2.00	River catch, or fuse 3 Glitched fish
Starlit	x2.50	Fuse 2 Rainbow fish

A fish holds only one mutation, and it stacks with rarity — a Shiny Mythic still keeps its Mythic earnings boost on top. For every fish’s base income and rarity odds, our Net a Fish mutations guide has the full breakdown.

Stack Mutation Luck Before You Cast

Every net throw rolls mutation chances per fish, so the more luck you stack and the fuller your net, the more rolls you get. My pre-cast checklist:

Mutation Magnet (Upgrades → Fishing): 10 levels, each adding +0.5% mutation luck for +5% at max. Buy it first — it’s permanent.
Fish Index pages: each completed page you claim grants a permanent +1% mutation chance. Finish a page, claim, then hunt that page’s missing species.
Skill tree: in the Luck branch, learn Lucky Waters, then unlock Shimmer — +5% mutation luck at Level 1 and +10% at Level 2 for one Skill Point each.
Mutation Luck potions (Potion Shop in the Hub): Tier IV adds +20% for $80,000 and Tier V adds +25% for $350,000. They’re timed, so activate them right before a session, not before a break.
Mutation baits: the Glitter Lure greatly increases mutation chance once you hit Captain at Rebirth 6 — buy it in the Bait Shop, equip it, and confirm it reads “IN USE.” Starlight Worm and Phoenix Feather also boost mutation odds as your Rebirth level climbs.
Game pass: Mutation Hunter (249 Robux) doubles your mutation chance. Don’t confuse it with the 2x Luck pass (349 Robux) — that one boosts rare fish odds, not mutations.

Finally, throw your net where fish are thickest and reel in a full net — more fish per throw means more mutation rolls, and Abyss Shrimp bait (+60% net capacity) helps you pack them in.

Fuse Duplicates in the Fish Cooler

Catching mutations is only half the system — fusion converts your duplicate stack into guaranteed upgrades. Open the Fish Cooler, tap Fuse All, and the ladder runs Shiny → Gold → Crystal → Glitched → Rainbow → Starlit:

Recipe	Required Stack
10 Normal fish	→ 1 Shiny
8 Shiny fish	→ 1 Gold
6 Gold fish	→ 1 Crystal
4 Crystal fish	→ 1 Glitched
3 Glitched fish	→ 1 Rainbow
2 Rainbow fish	→ 1 Starlit

Fusion is per species — 7 Shiny Galleon Gulpers need one more matching Shiny, and other species won’t fill the gap. Fish you catch directly at a higher tier count toward the next recipe, so a caught Gold fish joins your Gold stack instead of costing 80 normals. Fusion from scratch is expensive — one Starlit needs the full chain of 10 × 8 × 6 × 4 × 3 × 2, or 11,520 normal fish — which is exactly why you should keep every duplicate until you’ve fused; that “worthless” pile of normal minnows is a Starlit-in-waiting. The Auto Fuse game pass (199 Robux) fuses eligible stacks automatically and cascades up the ladder, though it doesn’t waive ingredient costs. Starlit is the ceiling: strongest regular mutation obtainable since the Mini-Games Update.

Fish During Mutation Events

Events multiply your mutation output more than anything you can buy, so plan sessions around them:

Wave Rush: kicks off with a “TSUNAMI WARNING” banner and sends three waves of rare fish. The third, Extreme wave (3/3) carries a x10 mutation bonus — the single biggest boost in the game. Keep throwing and reeling between waves instead of shopping.
Shimmer Surge: x3 mutated fish while active.
Lucky Tide: flat increased mutation chances — pair it with potions and Glitter Lure.

Don’t multiply event labels together with your pass and upgrade bonuses to predict a final percentage; the game rolls these internally. You’ll find every event’s schedule and buffs in our Net a Fish events guide, and grabbing a few free rewards from the latest Net a Fish codes before an event funds extra potions.

Reroll Mutations in the Pearl Shop

Two Pearl Shop tools fix showcase fish that rolled low. Mutation Reroll rerolls a fish already placed in your showcase — it may upgrade the mutation, keep it, or downgrade it. Mutation Lock blocks a downgrade on the next reroll and is consumed by that roll, so use it when a fish has reached Gold or better and you’re pushing for Crystal. Neither guarantees an upgrade, so reroll your duplicates, not your best earners. Pearls come from quests, the Quest Board and daily play — our pearl farming guide covers the fastest routes without Robux.

Showcase Mutated Fish the Right Way

A mutation is worth nothing until it’s on a showcase pad, so close the loop after every haul. Press Equip Best in the Fish Cooler — showcases never auto-swap, and I’ve caught myself leaving a Gold in the cooler for an hour while a normal fish sat on the pad collecting cash. Walk your pads to collect: a green ring means cash is ready to grab, a white ring means the slot is empty.

Before swapping new catches in, check each fish’s placement income preview rather than trusting its catch popup. Placement income doesn’t always match catch income, and a bigger lower-tier fish can out-earn a smaller higher-tier one of the same species. One more trap: the mutation multiplier applies to that fish’s individual earnings — never double-apply it to your whole pool’s total. When a reroll lands Gold or Starlit, move it in immediately and let the old occupant go.

Common Mistakes to Avoid

Expecting storage mutations: fish never mutate while sitting in the cooler or aquarium — fusion and catches are the only paths.
Mixing species in fusion: stacks fill per species only.
Selling duplicates too soon: normal and Shiny fish are fusion currency; cash them in, not out.
Buying potions too early: timed boosts expire while you’re offline.
Forgetting “Equip Best”: mutated fish only earn on showcase pads, and showcases don’t auto-swap — open the Fish Cooler, press Equip Best after every haul.
Confusing traits with mutations: traits are a separate global multiplier system you unlock at Rebirth 7 — see our traits guide.

FAQs

What is the best mutation in Net a Fish?

Starlit at x2.50 is the strongest obtainable mutation in 2026. The x3 Haunted mutation was Halloween-only and is no longer obtainable after the Mini-Games Update removed that content.

How do I get Gold and Shiny fish fast?

Fuse duplicates — 10 normal fish make a Shiny and 8 Shiny make a Gold — while running Mutation Luck potions and Glitter Lure during Shimmer Surge for direct Gold catches.

Does Mutation Magnet stack with potions and events?

Yes, all mutation luck sources stack, but you can’t multiply the displayed percentages into an exact final chance — treat them as layered bonuses, not a formula.