🧬 Fish Mutations & Multipliers Guide
In Roblox Abyss, some fish spawn with special mutations that change their appearance and dramatically increase their sell value. This guide covers every mutation, their multipliers, and how to maximize your chances of catching them.
What Are Fish Mutations?
Mutations are random modifiers that can appear on any fish you catch. A mutated fish has a distinct visual effect and its sell price is multiplied by the mutation's value. For example, a fish worth $100 with an Abyssal mutation (8.5×) would sell for $850.
All Mutations & Multipliers
There are currently 28 mutations in Abyss. Higher multipliers are significantly rarer. View the full list with images on the Mutations database page.
| Mutation | Multiplier | Rarity Tier |
|---|---|---|
 | ×0.33 | Common |
 | ×1 | Common |
 | ×1.1 | Common |
 | ×1.1 | Common |
 | ×1.2 | Common |
 | ×1.25 | Common |
 | ×1.3 | Common |
 | ×1.35 | Common |
 | ×1.4 | Common |
 | ×1.45 | Common |
 | ×1.5 | Uncommon |
 | ×1.7 | Uncommon |
 | ×1.75 | Uncommon |
 | ×2 | Rare |
 | ×2 | Rare |
 | ×2 | Rare |
 | ×2.3 | Rare |
 | ×2.4 | Rare |
 | ×2.5 | Rare |
 | ×2.8 | Rare |
 | ×2.8 | Rare |
 | ×3.6 | Very Rare |
 | ×3.75 | Very Rare |
 | ×4 | Very Rare |
 | ×4.2 | Very Rare |
 | ×6.66 | Ultra Rare |
 | ×7.77 | Ultra Rare |
 | ×8.5 | Ultra Rare |
How to Get Mutated Fish
Mutated fish spawn randomly when fishing. Each mutation has its own hidden rarity — higher-value mutations like Abyssal, Angelic, and Shadow are significantly rarer than common ones like Rock or Moss.
Tips for Catching More Mutated Fish
- Fish more, catch more — Mutations are purely RNG-based, so volume is key. The more fish you catch, the more mutations you'll encounter
- Upgrade your Gun — Better fishing gear increases your overall catch efficiency, giving you more attempts per dive
- Upgrade your Tube — Longer dives mean more catches per trip
- Fish in deeper biomes — There are reports of higher mutation rates in more dangerous areas, though mutations ultimately remain RNG-based
- Target valuable base fish — A mutation on a rare fish yields far more money than the same mutation on a common fish
Frequently Asked Questions
What's the best mutation?
Abyssal is currently the most valuable mutation with an 8.5× multiplier and a distinctive dark glow effect.
Can any fish have a mutation?
Yes, most fish in Abyss can spawn with mutations, though the visual effect scales differently based on the fish model.
Do mutations affect gameplay beyond sell price?
Mutations primarily affect sell value and appearance. They do not change fishing mechanics or combat interactions.
Do better rods increase mutation chances?
Better rods/guns improve catch efficiency, indirectly increasing mutation encounters by letting you catch more fish. However, the mutation roll itself is still RNG-based.