Be a Fish Bait Mutations Guide: How to Get Mutated Fish and Every Mutation Multiplier!

Mutated fish are among the most valuable catches you can obtain in Be a Fish Bait. Besides giving your aquarium a more unique appearance, these special variants generate significantly more money than standard fish, making them essential if you want to maximize your passive income.

Because mutations are largely based on luck, understanding how they work can greatly improve your chances of catching the rarest variants. This guide explains every way to obtain mutated fish, lists all current mutation multipliers, and shows how multiple mutations can be combined on a single fish.

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How to Get Mutated Fish in Be a Fish Bait

Every time you cast your fishing line, there’s a random chance that the fish you catch will spawn with a mutation. While there’s no guaranteed method to force mutations, several mechanics can noticeably improve your odds of landing these valuable catches.

One of the best ways to increase your mutation rate is by using Auras that boost Mutation Luck. Certain Auras provide bonuses that improve your chances of catching mutated fish during normal fishing sessions. Among the most useful options are:

• Yinyang Aura
• Voidspore Aura

If you’re planning to spend a lot of time fishing, investing in one of these Auras is highly recommended, as they provide a consistent boost without requiring any additional effort.

Fish During Special Weather Events

Some mutations only become available while specific weather effects are active. Keeping an eye on the current weather can greatly increase your chances of finding certain rare mutations.

Glitched Weather

When Glitched Weather appears, every catch has an additional chance of receiving the Glitched mutation. This limited-time weather bonus makes it one of the best opportunities to hunt one of the stronger mutations in the game.

Delulu Weather

The Delulu mutation is exclusive to Delulu Weather. If you’re trying to complete your mutation collection or build powerful mutation combinations, fishing during this event should be one of your top priorities.

Don’t Ignore Quick-Time Pop-Ups

Occasionally, a small button appears on your screen shortly after casting your line. These pop-up prompts disappear quickly, so reacting fast is important.

Successfully pressing the button before it vanishes increases your chances of receiving a particular mutation on your current catch, giving you another opportunity to improve your overall mutation rate.

Catch Boss Fish for Champion Mutations

The Champion mutation follows different rules from every other mutation. Instead of appearing on normal catches, Champion can only be obtained from Boss Fish. Whenever you hook one of these powerful fish, there’s roughly a 30% chance it will receive the Champion mutation, making boss encounters especially rewarding for players chasing high-value fish.

Each mutation increases the amount of money a fish generates inside your aquarium. The stronger the mutation, the larger the income bonus. However, rarer mutations also tend to have lower appearance rates.

• Gold 1.5×
• Diamond 2×
• Delulu 2×
• Champion 3×
• Plasma 4×
• Glitched 5×
• Molten 6×
• Radioactive 8×

At the moment, Radioactive offers the highest earnings multiplier, making it the most valuable standard mutation currently available.

Best Mutation for Making Money

If your main goal is maximizing passive income, Radioactive is the strongest mutation you can obtain. With an impressive 8× earnings multiplier, a Radioactive fish produces far more money than its normal counterpart, making it one of the best long-term investments for your aquarium. Although it can be difficult to find because of its rarity, every Radioactive fish dramatically improves your overall earnings.

Can Fish Have Multiple Mutations?

• Yes, but only under certain conditions.

A fish cannot receive multiple standard mutations at the same time. Instead, the mutation system separates them into two categories.

Normal Mutations

These mutations are mutually exclusive, meaning only one can appear on a fish.

They include:

• Gold
• Diamond
• Plasma
• Glitched
• Molten
• Radioactive

A fish can never possess two of these normal mutations simultaneously.

Special Mutations

Special mutations work differently.

These include:

• Delulu
• Champion

Rather than replacing a normal mutation, Special Mutations can be added on top of one.

How Mutation Stacking Works

Because Delulu and Champion belong to the Special category, they can combine with a Normal Mutation.

For example:

• A Boss Fish with the Radioactive mutation can also receive Champion.
• A fish caught during Delulu Weather may keep its Normal Mutation while also gaining Delulu.
• Boss Fish caught during Delulu Weather can potentially receive both Champion and Delulu in addition to a Normal Mutation.

This means the strongest possible mutation combination currently available is:

• Radioactive
• Champion
• Delulu

Since all three bonuses stack together, this combination creates one of the highest-earning fish possible in the game.

Mutations play a huge role in both progression and profit in Be a Fish Bait. While obtaining them ultimately comes down to luck, understanding the mechanics behind weather events, Boss Fish, Mutation Luck Auras, and stacking rules can significantly improve your odds of landing high-value catches.

If you’re aiming to build the most profitable aquarium possible, focus on increasing your mutation chances, hunt for Radioactive fish whenever you can, and take advantage of Delulu and Champion mutations to create the strongest mutation combinations currently available.