As of the Delulu Update, there are 8 different mutations in Be a Bait for Fish. These mutations apply unique cosmetics to the fish as well as increase their base earning rate. The best mutation in the game right now is Radioactive (8x multiplier). See our full guide below to learn everything you should know about the mutations mechanic in Be a Fish Bait.
If you want to get rich quick and want your aquarium to stand out from the rest, you need to fill it with mutated fish. Mutated fish have unique cosmetics, and they also have higher per-second earnings than their base variants. To do that, you need to first understand how this system works. So, we’ve put together this detailed Be a Fish Bait mutations guide that will tell you how to get mutated fish, the exact money multipliers of each mutation, and more.
How to Get Mutated Fish in Be a Fish Bait
Obtaining mutated fish in Be a Fish Bait is completely RNG-based. Every time you cast the line, there’s a chance that you can get a fish with a random mutation. However, there are a few things that you can do to boost your chances of getting mutated fish in Be a Fish Bait. Read on to learn what those are:
- Use Auras that boost Mutation Luck. Auras like the Yinyang and Voidspore give mutation luck boosts that can help you catch plenty of mutated fish.
- Fish during the Glitched weather for a +10% chance of catching fish with the Glitched mutation.
- Click on the pop-ups that appear on the screen when you throw the bait. Every time you cast the line, there’s a chance that a small button will pop up on your screen. Press those buttons before they disappear to increase your chance of getting a certain mutation.
- Champion mutation only appears on Boss Fish. Every time you hook a Boss Fish, there’s a 30% chance that it can get the Champion mutation.
- Fish during the Delulu weather to get a chance of catching fish with the Delulu mutation.

That’s all the ways to get fish with mutation in Be a Fish Bait. Mutations with a higher multiplier have a lower chance of affecting a fish, and vice versa. Read on to learn about the multipliers of each mutation in Be a Fish Bait.
What Are All The Be a Fish Bait Mutation Multipliers
There are EIGHT mutations in Be a Fish Bait right now. The table below lists all of them and the respective multipliers they apply to a fish’s earning rate.
| Mutation | Multiplier |
|---|---|
| Gold | Increases the earning rate of your fish by 1.5x |
| Diamond | Increases the earning rate of your fish by 2x |
| Delulu | Increases the earning rate of your fish by 2x |
| Champion | Increases the earning rate of your fish by 3x |
| Plasma | Increases the earning rate of your fish by 4x |
| Glitched | Increases the earning rate of your fish by 5x |
| Molten | Increases the earning rate of your fish by 6x |
| Radioactive | Increases the earning rate of your fish by 8x |
Note: As the developers add more mutations to Be a Fish Bait, we’ll update this guide accordingly.
For now, Radioactive is the best mutation in Be a Fish Bait because it applies the highest multiplier to the fish (8x). The highest mutation combo is Radioactive x Delulu x Champion.

Can Fish Get Multiple Mutations in Be a Fish Bait?
Yes, it is possible to get multiple mutations on a fish in Be a Fish Bait. However, the only mutations that can be added are Delulu and Champion. To better understand how the multiple mutations system works, we’ll divide the mutations into two categories:
- Normal Mutations (Gold, Diamond, Plasma, Glitched, Molten, Radioactive).
- Special Mutations (Delulu, Champion).
The following example will help you better understand how it works.
If you catch a Boss Fish with any Normal Mutation, that fish can have both the Normal Mutation and the Champion Mutation. Similarly, if you catch a fish with the Normal Mutation during the Delulu weather, it has a chance to have both the Normal Weather and the Delulu mutation.
Both the Delulu and the Champion mutations will stack additively on top of the Normal Mutation. Getting multiple Normal Mutations is not possible, but a fish can have one Normal mutation and both the Special Mutations (Delulu and Champion).
That’s all there is to know about the Be a Fish Bait mutations system. Make sure you at least get the Yinyang Aura if you want to collect mutated fish. If you’re running short of Aura Rerolls, redeem the latest Be a Fish Bait Codes to get some for free.