Fish It Mutations Tier List: Real Ranking

This article ranks the mutations available in the Roblox game Fish It from best to worst, based on their in-game effects and how they affect your fishing. You enter the mutation you have (or are considering) and the calculator below shows how it changes your fish’s value and rarity. The tier list that follows gives you the full picture of which mutations are worth keeping and which are better to reroll.

Formula

The value of a mutated fish is calculated as:

New Value = Mutation Multiplier × Base Fish Value

Where:

• Mutation Multiplier (m) – a number assigned to each mutation (e.g., 1.5 for a 1.5× boost).
• Base Fish Value (b) – the value of the fish without any mutation, in coins.

This simple multiplication is the core mechanic for all mutations in the game. The calculator above lets you plug in any mutation’s multiplier and your fish’s base value to see the result.

Worked Example

Using the default values from the calculator:

1. Mutation Multiplier = 1 (no mutation)
2. Base Fish Value = 100 coins
3. New Value = 1 × 100 = 100 coins

So a fish with no mutation is worth exactly its base value. If you had a mutation with a 2× multiplier, the new value would be 2 × 100 = 200 coins.

How Mutations Work in Fish It

Mutations are random modifiers that can appear on any fish you catch. They are applied instantly when you reel in the fish, and they change its value and sometimes its appearance. Each mutation has a fixed multiplier, and that multiplier is the only thing that affects the fish’s worth – rarity of the fish itself is separate. Mutations are independent of fish species, so a common fish with a rare mutation can be worth more than a legendary fish without one.

The Tier List

Based on the multipliers that are commonly documented in the game, here is the ranking from best to worst:

• S-Tier (Best): Shiny (3×), Golden (2.5×) – these give the highest value boosts and are extremely rare.
• A-Tier: Albino (2×), Dark (2×) – solid multipliers, still quite rare.
• B-Tier: Mutated (1.5×), Crystal (1.5×) – decent boost, more common than the above.
• C-Tier: Big (1.25×), Small (1.1×) – small boost, very common.
• D-Tier (Worst): No mutation (1×) – no effect on value.

This tier list is based on the multipliers that have been observed in the game. The exact numbers can change with updates, so always check the current game version.

How to Choose Which Mutation to Keep

When you catch a fish with a mutation, you have the choice to keep it or release it. The decision should be based on:

• Value per inventory slot: Higher multiplier means more coins per slot, so S-tier mutations are always worth keeping.
• Rarity of the mutation: Even a low multiplier mutation on a very rare fish might be worth more than a high multiplier on a common fish – but the multiplier is the same, so it’s the base value that matters.
• Collection goals: If you’re trying to complete a mutation collection, you might keep a low-tier mutation on a rare fish.

Common Mistakes and Misconceptions

A frequent mistake is assuming that a rarer fish automatically has a higher value with the same mutation. That is true – because the base value is higher – but the multiplier is the same. Another misconception is that some mutations stack. They do not; each fish has exactly one mutation. Also, players often confuse the mutation’s multiplier with the fish’s rarity multiplier. They are separate: rarity determines base value, mutation multiplies it.

Limits of the Tier List

This tier list is a general guide, but the actual value of a mutation can depend on the current game meta and updates. Developers sometimes rebalance multipliers, so a mutation that is S-tier today might become A-tier tomorrow. Always check the latest patch notes or community resources for the most current data. Also, the calculator assumes you know the base value of the fish – that value is shown in the game’s fish collection menu.

Frequently Asked Questions

What is the rarest mutation in Fish It?

The rarest mutation is generally considered to be Shiny, with a 3× multiplier. It is extremely rare to encounter, and it gives the highest value boost.

Can mutations be removed or changed?

No, mutations are permanent once the fish is caught. You cannot reroll or remove them. The only way to get a different mutation is to catch another fish.

Do mutations affect the fish’s size or catch rate?

No, mutations only affect the value. They do not change the fish’s size, the difficulty of catching it, or the catch rate.

Is a 2× mutation always better than a 1.5× mutation?

Yes, in terms of value, a 2× multiplier always gives a higher value than a 1.5× multiplier, regardless of the fish’s base value.

How do I know the base value of a fish?

The base value is listed in the fish collection menu in the game. It is the value shown without any mutation applied.

Are there any mutations that reduce value?

No, all mutations have a multiplier of 1 or higher. There are no negative mutations in the game.

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in m | Mutation | - | 1 | 0
in b | Base fish value | - | 100 | 0
out v | New value | - | m * b | 2
out mult | Value multiplier | x | m | 2