Deep Fishing Mutations Tier List (November 2026) All 9 Ranked

Mutations in Deep Fishing multiply both a fish’s sale value and its Pond earning rate, and the best mutation right now is Cosmic at 15x. I’ve ranked all nine mutations by value multiplier, how hard each is to get, and whether it’s worth a reroll. Cosmic and Lava own the S-Tier because their weather events turn almost any catch into a jackpot, while Gold and Wet are basically pocket change. Here’s the full breakdown, plus how to farm rerolls before the Trading update lands on November 25.

How I Ranked Every Mutation?

My criteria are simple: value multiplier first, availability second. A 15x multiplier means nothing if you can’t catch it, so I weighed how each mutation is obtained — seven of them only appear during weather events that rotate every few minutes per server, while Gold and Diamond can spawn randomly on any fish at any time. I also factored in reroll odds from the Mutation Dealer’s menu, where rare mutations carry tiny roll chances. Low multipliers rank lower because they fill your inventory faster than your wallet.

S-Tier Mutations

Cosmic (15x) and Lava (12x) are the only mutations worth planning your sessions around. Both are locked to their tied weather events — Cosmic and Volcano — but while those events run, fish in the affected area can roll them constantly. My strategy: when either event starts, cast nonstop, keep one Cosmic fish in your Pond for passive income, and sell duplicates while the event runs. A single Cosmic catch out-earns a whole haul of Gold fish.

A-Tier Mutations

Diamond (8x), Cursed (6.5x), Electro (5x), Toxic (4x), and Frozen (3.5x) form the middle pack. Diamond is the standout because it spawns randomly like Gold but pays four times more — every random Diamond catch is an instant keeper. Cursed, Electro, Toxic, and Frozen only appear during their matching Cursed, Thunder, Toxic, and Blizzard events, so catch them while their weather rotates through. They make solid Pond earners, but I’d never burn an Ultra Reroll chasing anything below Diamond.

B-Tier Mutations

Wet (2.5x) and Gold (2x) sit at the bottom. Wet comes from the Rain event, which is common weather — that’s exactly why it pays so little — and Gold spawns randomly on any fish you hook. My rule: sell B-Tier catches immediately and save Pond slots for A and S-Tier fish. The one exception is early game, where even a 2x Gold fish doubles your income while you grind cash for better rods and Strength upgrades.

How to Get Mutations Fast?

There are three ways to mutate a fish in Deep Fishing:

1. Weather events — Rain (Wet), Blizzard (Frozen), Toxic, Thunder (Electro), Cursed, Volcano (Lava), and Cosmic events rotate every few minutes per server, one at a time.
2. Random spawns — Gold and Diamond can appear on any fish, no event required.
3. Mutation Dealer — Found next to the Group Chest on the starter island. Equip a fish, open the Reroll menu, and hit Spin. Each roll costs a Mutation Reroll item from fishing, or a 39-Robux Ultra Reroll with better odds. Roll chances are listed right in the menu.

Pro Tips Most Players Miss

• Luck boosts mutation odds. Redeem free codes like Mutations and update9 for bait and Luck Potions, and use a high-Luck rod while farming.
• The “More Mutations” gamepass (349 Robux) raises odds permanently — worth it only for daily rerollers.
• Don’t hoard rerolls. The First Mutation badge has a 56.2% unlock rate, so most players mutate a fish naturally while fishing.
• Stock S-Tier catches before November 25, when the Trading update lets players trade fish — mutated fish could become the game’s hottest commodity. If you’re hunting more catches, my Ship Piece locations guide for Deep Fishing and the Fisch FischFright 3 bestiary cover other Roblox fishing grinds.

FAQs

What is the best mutation in Deep Fishing?

Cosmic. Its 15x multiplier is the highest in the game and boosts both the sale price and Pond earnings.

How many mutations are in Deep Fishing?

Nine as of the Halloween World update: Gold, Wet, Frozen, Toxic, Electro, Cursed, Diamond, Lava, and Cosmic.

Do Gold and Diamond appear during weather events?

No. Both spawn randomly on fish at any time — they’re never tied to weather.

What does an Ultra Reroll do?

It rerolls a fish’s mutation with better odds than a standard Mutation Reroll and costs 39 Robux.

Related Reads

• All 10 Ship Piece Locations in Deep Fishing
• Steal An Egg Tier List (Best Pets Ranked)
• Fisch FischFright 3 Bestiary — All 44 Fish