Mutations are one of the best ways to make more money in Deep Fishing on Roblox. They give your fish special effects and increase their value, allowing you to earn more Coins from the same catch.
However, not every mutation is equally valuable. While Gold only provides a 2x multiplier, powerful mutations like Cosmic, Lava, and Bloodlit can increase a fish’s value by 12x to 15x.
Choosing which mutated fish to sell and which to keep in your Fish Pond can make a big difference in your progression.
In this Deep Fishing Mutations Tier List, we rank all 11 mutations from S to C tier, explain their multipliers, and show you how to obtain them.
Total Mutations: 11
Best Mutation: Cosmic (15x)
Other Top Mutations: Lava and Bloodlit (12x)
Best Random Mutation: Diamond (8x)
Lowest Multiplier: Gold (2x)
Mutation Sources: Weather Events, Random Catches, Pearl Item, and Mutation Rerolls
Deep Fishing Mutations Tier List
We have ranked all mutations based primarily on their sell value multiplier. A higher multiplier makes a fish more valuable and also improves its earning potential when placed in your Fish Pond.
S Tier contains the strongest money-making mutations, while A Tier offers excellent alternatives. B Tier mutations are useful during normal progression, and C Tier contains the weakest options.
| Tier | Mutations |
|---|---|
| S Tier | Cosmic, Lava, Bloodlit |
| A Tier | Diamond, Cursed, Pearl |
| B Tier | Electro, Toxic, Frozen |
| C Tier | Wet, Gold |
Cosmic is the best mutation for maximum earnings, but Diamond is also valuable because it can appear naturally without waiting for a special weather event.
All Deep Fishing Mutations, Multipliers & How to Get
Here is the complete list of 11 mutations available in Deep Fishing, including their multipliers and obtainment methods.
| Mutation | Multiplier | How to Get |
|---|---|---|
| Cosmic | 15x | Cosmic Weather Event |
| Lava | 12x | Volcano Weather Event |
| Bloodlit | 12x | Bloodmoon Weather Event |
| Diamond | 8x | Randomly obtained from normal catches |
| Cursed | 6.5x | Cursed Weather Event |
| Pearl | 6x | Use a Pearl obtained from Captain Fathom |
| Electro | 5x | Thunder Weather Event |
| Toxic | 4x | Toxic Weather Event |
| Frozen | 3.5x | Blizzard Weather Event |
| Wet | 2.5x | Rain Weather Event |
| Gold | 2x | Randomly obtained from normal catches |
Note: These are the reported mutation multipliers following the Halloween update. The developers may introduce additional mutations or adjust existing values in future patches.
S Tier – Best Mutations in Deep Fishing
1. Cosmic Mutation (15x)
Cosmic is currently the strongest mutation in Deep Fishing.
It provides a massive 15x value multiplier, making mutated fish significantly more valuable than their normal versions.
For example, if a normal fish sells for 10,000 Coins, a Cosmic version with the same base value would sell for 150,000 Coins.
You can obtain Cosmic by catching fish during the Cosmic Weather Event.
Because of its enormous multiplier, Cosmic is particularly valuable on expensive fish that you want to keep in your Pond for passive income.
2. Lava Mutation (12x)
Lava is another top-tier mutation that provides a 12x multiplier.
It is obtained during the Volcano Weather Event.
Although Lava is slightly weaker than Cosmic, it still offers excellent earning potential.
If you catch a valuable fish with Lava, consider keeping it in your Fish Pond rather than selling it immediately.
3. Bloodlit Mutation (12x)
Bloodlit is a powerful mutation associated with the Bloodmoon Weather Event.
It provides the same 12x multiplier as Lava, making it one of the strongest mutations available.
Bloodlit is worth prioritizing whenever its weather event becomes active, especially if you have a strong fishing rod and bait ready.
A Tier – Strong Mutations Worth Keeping
4. Diamond Mutation (8x)
Diamond is one of the most useful mutations because it provides an 8x multiplier without requiring a special weather event.
It can appear randomly on fish during normal fishing.
This means you have a chance of obtaining Diamond while farming Coins or catching fish for your collection.
Diamond is an excellent mutation for players who cannot regularly participate in special weather events.
5. Cursed Mutation (6.5x)
Cursed provides a 6.5x multiplier and appears during the Cursed Weather Event.
It is weaker than Diamond but still offers a significant boost over normal fish.
Cursed fish can be useful for generating income while you work toward obtaining stronger mutations.
6. Pearl Mutation (6x)
Pearl provides a 6x value multiplier.
Unlike most mutations, Pearl is associated with a special item obtained from Captain Fathom rather than a standard weather event.
Its multiplier makes it a strong alternative to Cursed and Electro.
Players should check the current Pearl item requirements before applying the mutation to their fish.
B Tier – Good Mid-Game Mutations
7. Electro Mutation (5x)
Electro gives fish a 5x multiplier and can be obtained during the Thunder Weather Event.
It is a good option for players who want to increase their income without waiting for the rarest weather conditions.
8. Toxic Mutation (4x)
Toxic provides a 4x multiplier and appears during the Toxic Weather Event.
Although its multiplier is lower than Electro, it still provides four times the normal value of the same fish.
9. Frozen Mutation (3.5x)
Frozen is obtained during the Blizzard Weather Event and offers a 3.5x multiplier.
It is useful during early and mid-game progression, but players should eventually replace lower-value Pond fish with stronger mutated catches.
C Tier – Weakest Mutations in Deep Fishing
10. Wet Mutation (2.5x)
Wet is obtained during Rain Weather and provides a 2.5x multiplier.
It increases fish value, but the boost is relatively small compared with stronger mutations.
Wet fish are generally better for selling unless the fish itself has a high base value.
11. Gold Mutation (2x)
Gold is the weakest mutation in Deep Fishing, offering a 2x multiplier.
It can appear randomly on fish without requiring a weather event.
Gold is useful for beginners because it doubles a fish’s value, but it becomes less attractive once you start obtaining stronger mutations.
How to Get Mutations in Deep Fishing
There are several ways to obtain mutated fish in Deep Fishing.
1. Catch Fish During Weather Events
Most mutations are connected to a specific weather event.
For example, Cosmic appears during Cosmic weather, Lava during the Volcano event, and Electro during Thunder weather.
When your desired weather event becomes active, continue fishing to increase your chances of obtaining the corresponding mutation.
Weather-based mutations are not guaranteed on every catch.
2. Catch Random Mutated Fish
Gold and Diamond can appear randomly while fishing, without any special event.
This makes them useful for players who want mutated fish through regular gameplay.
3. Use Mutation Rerolls
Deep Fishing also includes a Mutation Reroll system that allows players to attempt to change the mutation on a fish.
Standard rerolls can be obtained through fishing, while Ultra Rerolls offer another option for attempting higher-value mutations.
However, rerolling is not guaranteed to produce the mutation you want.
Save valuable rerolls for fish with strong base values rather than using them on weak catches.
4. Use Special Mutation Items
The Pearl mutation can be obtained through a Pearl item associated with Captain Fathom.
This provides an alternative to weather-based mutations, although its exact item requirements should be verified in-game.
Best Mutations for Fish Pond Passive Income
Your Fish Pond allows you to earn income from fish placed inside it.
Since mutations increase the earning potential of fish, choosing the right mutated catches is important.
Here is our recommended priority:
- Highest Priority: Cosmic, Lava, Bloodlit
- Strong Alternatives: Diamond, Cursed, Pearl
- Temporary Options: Electro, Toxic, Frozen
- Replace When Possible: Wet, Gold
However, remember that a fish’s base value is also important.
A valuable fish with an 8x Diamond mutation may earn more than a cheap fish with a 15x Cosmic mutation.
Which Mutation Should You Reroll?
If you have limited Mutation Rerolls, avoid using them randomly on every fish.
Instead, focus on valuable fish that would benefit significantly from a stronger multiplier.
For example, rerolling a high-value fish with Gold or Wet could be worthwhile if you are trying to obtain Diamond, Lava, or Cosmic.
However, rerolls involve luck, and you may not obtain the desired mutation.
It is generally better to prioritize rare, valuable fish rather than wasting resources on low-value catches.
Final Thoughts
That completes our Deep Fishing Mutations Tier List.
There are currently 11 listed mutations, ranging from Gold at 2x to Cosmic at 15x.
Cosmic is the strongest overall mutation, followed by Lava and Bloodlit. Diamond is also an excellent option because it can appear randomly without requiring a weather event.
If you want to earn more Coins, focus on collecting valuable mutated fish, using the Fish Pond effectively, and saving Mutation Rerolls for strong catches.
Which mutation are you currently trying to get in Deep Fishing? Let us know in the comments below.
For more Roblox content, explore our Roblox Game Codes and latest Roblox guides.
FAQs
What is the best mutation in Deep Fishing?
Cosmic is the best mutation because it provides the highest listed sell value multiplier at 15x.
How many mutations are in Deep Fishing?
There are 11 mutations listed following the Halloween update, including Bloodlit and Pearl.
How do you get Cosmic mutation?
Cosmic can be obtained by catching fish during the Cosmic Weather Event or attempting a mutation reroll.
What is the best mutation without weather events?
Diamond is the strongest naturally occurring mutation that does not require a weather event, providing an 8x multiplier.
Do mutations increase Fish Pond earnings?
Yes. Mutations increase a fish’s value and its earning potential in the Fish Pond. The actual income depends on the fish and its mutation.
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