The Deep Mutated Boss is the highest-earning creature in the Deep rarity tier within the Roblox game Steal A Fish by MY FISH FRIEND. It costs $50 trillion in in-game cash and generates a base income of $5 billion per second ($5,000,000,000/s). Beyond its standalone earning power, its primary value lies in acting as the top flat-rate income anchor for all percentage-scaling Secret and Limited fish in your base.
Deep Mutated Boss Stats and Deep Tier Comparison
In Steal A Fish, the Deep rarity sits above Cosmic and below the Abyss tier. While earlier Deep-tier creatures produce millions of dollars per second, the Deep Mutated Boss is the premier earner of the category.
The following table lists the confirmed purchase prices and base earnings for all fish in the Deep rarity tier:
| Fish | Rarity | Purchase Price | Money per Second |
|---|---|---|---|
| Mutated El Gran Maja | Deep | $10 Billion ($10B) | $1,600,000/s |
| SCP | Deep | $50 Billion ($50B) | $6,940,000/s |
| Mouth Titan | Deep | $50 Billion ($50B) | $9,250,000/s |
| Leviathan | Deep | $75 Billion ($75B) | $12,200,000/s |
| Nightmare Maja | Deep | $125 Billion ($125B) | $16,500,000/s |
| Nightmare Eater | Deep | $350 Billion ($350B) | $38,500,000/s |
| Baron | Deep | $900 Billion ($900B) | $77,100,000/s |
| World Eater | Deep | $10 Trillion ($10T) | $1,500,000,000/s |
| Deep Mutated Boss | Deep | $50 Trillion ($50T) | $5,000,000,000/s |
Among fixed-income Deep creatures, the Deep Mutated Boss provides more than triple the income of the next closest Deep fish, the World Eater ($1.5B/s).
Why Deep Mutated Boss Powers Scaling Secret Fish
Many of the top units in Steal A Fish do not have a flat dollar-per-second payout. Instead, high-tier Secret and Limited units feature scaling descriptions such as "X% better than your best fish." These scalers evaluate the single highest flat-rate producer sitting on your base tiles to calculate their output.
If your best base fish only generates a few million per second, percentage-scaling fish output relatively modest sums. Placing a Deep Mutated Boss on your base establishes a $5 billion per second baseline.
Common scaling fish that multiply directly off this baseline include:
- Scottfish (Secret): Generates 50% better than your best fish.
- Spiderfish (Secret): Generates 75% better than your best fish.
- Nightmare Blobfish (Secret): Generates 90% better than your best fish.
- Orcalelo Orcala (Secret): Generates 100% better than your best fish.
- Hungry Tung (Secret): Generates 120% better than your best fish.
- Baby Deep Eater (Secret): Generates 130% better than your best fish.
- Hungry Deer (Secret) / Demogorgon Worm (Limited): Generates 150% better than your best fish.
- The Moon (Secret): Generates 160% better than your best fish.
Because scaling units calculate dynamic values rather than static numbers, acquiring one Deep Mutated Boss lifts the income of every percentage-based unit in your base simultaneously.
How to Get the Deep Mutated Boss
Players have three verified methods for obtaining a Deep Mutated Boss in Steal A Fish:
- Buying from the River Conveyor: The Deep Mutated Boss can naturally spawn on the central river track. Because it belongs to the Deep rarity, spawns are infrequent. Players frequently utilize Server Luck multipliers (ranging from 2x up to 99x) or wait for server-wide "Guaranteed Deep" countdown timers. Once it floats past your platform, you can buy it if you have $50 trillion in cash.
- Direct Robux Purchase: When the Deep Mutated Boss passes your base and you do not have enough cash, the game provides a direct Robux purchase prompt. Depending on server prompts observed in gameplay sessions, this prompt generally ranges between 2,500 and 3,000 Robux.
- Stealing from Another Player: If another player places a Deep Mutated Boss on their base without the Unstealable mutation, rivals can open the base gateway (either through lock expiration, Robux gate-opening, or unshielded entrances) and carry the fish back to their own base.
Mutations on the Deep Mutated Boss
Like other fish in Steal A Fish, the Deep Mutated Boss can spawn with special mutations that alter its visual appearance and properties:
- Unstealable (7.5% baseline chance): Prevents other players from picking up or stealing the fish from your base.
- Gold (5% baseline chance): Gives the unit a golden appearance.
- Void (2.5% baseline chance): Applies a dark void visual effect.
- Magma (.5% baseline chance): Applies a glowing red magma theme.
- Dead (0.2% baseline chance): Alters the model to a skeletal/dead variant.
On fixed-rate creatures like the Deep Mutated Boss, standard visual mutations do not diminish the base $5 billion per second earnings. However, the Unstealable trait is the most practically protective modifier for public servers.
Frequently Asked Questions
Is the Deep Mutated Boss the highest earning fish in Steal A Fish?
No. While it is the strongest earner in the Deep rarity ($5B/s), higher fixed-income tiers exist, including Abyss fish (such as Zholthagru at $23T/s and Seeker at $2.6Qa/s) as well as specific late-game Event units. However, the Deep Mutated Boss is one of the most accessible anchors used to bridge early billions into trillions.
Do you lose the Deep Mutated Boss when you Rebirth?
Rebirths in Steal A Fish only consume the specific fish listed in the Rebirth requirements window (such as specific commons, epics, or legendaries needed for that tier). A Deep Mutated Boss will remain in your base across rebirths unless a specific rebirth milestone explicitly lists it as a sacrifice requirement.
Can you place multiple Deep Mutated Bosses in one base?
Yes. If you have open base slots, you can own and place multiple Deep Mutated Bosses. Each unit will produce its flat $5B/s rate, though percentage-based scalers only scale off the single highest fish value rather than stacking baseline totals together.
How do you protect a Deep Mutated Boss from being stolen?
You can protect it by catching one rolled with the Unstealable mutation, by keeping your base doors locked, or by purchasing base forcefield timers (such as the 24-hour lock option). Playing in private servers, which are free in Steal A Fish, also prevents unwanted theft from other players.
