In the Roblox tycoon simulation Steal A Fish by developer MY FISH FRIEND, the rarest fish belong to the Secret, Abyss, Deep, and Radioactive mutation categories. Unlike standard river spawns that produce static cash per second, top-tier fish either output flat sums reaching billions or quadrillions per second, or provide percentage multipliers that scale directly off the highest-earning pet placed inside your base.
Acquiring these endgame creatures requires monitoring timed weather events, spending massive in-game cash or Robux on luck multipliers, and protecting your base against raids by opposing players.
Top Secret Percentage Fish and Multipliers
The most powerful fish in Steal A Fish feature percentage-based yields rather than fixed cash per second. These creatures calculate their earnings from whichever fish in your base currently produces the highest base income. Pairing a high flat-rate producer with multiple percentage multiplier pets causes total server income to scale exponentially.
| Fish Name | Rarity Tier | Documented Base Multiplier | Acquisition Cost or Method |
|---|---|---|---|
| Event Monster (Kulu) | Abyss / Secret | 250% of best fish | Spawns during the limited Abyss Event |
| The Moon | Secret | 160% of best fish | 150 Trillion cash or 4,000–5,000 Robux |
| Hungry Deer | Secret | 150% of best fish | 50 Trillion cash or 4,000 Robux |
| Evil Bloop (Golden Oops) | Limited / Secret | 150% of best fish | OG stock / admin event compensation |
| Hungry Tongue | Secret | 120% of best fish | 50 Billion cash |
| Orca Borca (Orcalero) | Secret | 100% of best fish | River spawn / server luck roll |
| Secret Spiderfish | Secret | 75% of best fish | River spawn / server luck roll |
Percentage fish do not generate substantial income on their own. If your base contains only percentage pets and low-tier commons, their production remains minimal until you anchor the collection with a high flat-rate earner.
High-Income Deep Rarity Fish
Deep rarity fish represent the primary flat-rate anchors needed to fuel percentage multipliers. They spawn through the central river tunnel and can be accelerated using server luck boosts up to 99x.
The Deep Mutated Boss stands as one of the most reliable foundation pets in the game, generating a flat 5 Billion cash per second. Players can acquire it from the river for 50 Trillion in-game cash or through direct shop purchase for 2,500 to 3,000 Robux. When placed alongside pets like The Moon (160%) or Hungry Deer (150%), each percentage fish outputs 8 Billion and 7.5 Billion per second respectively from a single anchor.
Other documented Deep rarity spawns include:
- Mouth Titan: A high-tier river spawn within the Deep category.
- SCP from the Deep: Costs 50 Billion cash when swimming through the tunnel.
- Jeep World: Recorded river spawn requiring 10 Trillion cash.
Abyss Event Exclusives and Rare Spawns
Abyss pets do not appear under normal server conditions. They are tied to the Abyss map event, which occurs periodically on servers (observed roughly once per hour or during specific environmental rotations).
During the Abyss event, rare entities appear along the waterway, including:
- Chickaluku: One of the central event targets. Players actively stockpile mutations of this pet, including Chaos Chickaluku, Dead Chickaluku, and Elder variants.
- Dragon Tha: A coveted Abyss-tier attacker and income generator.
- Abyss Reaver: Recorded at income levels reaching 35 Quadrillion per second with late-game mutations.
- Slicktail and Aur Boat: Event-exclusive models tied to the Abyss environment.
Because Abyss events run on short timers (often around 4 minutes), players frequently activate server luck boosts or coordinate alternate accounts to capture as many event spawns as base inventory permits.
Endgame Quadrillion Earner Fish and Radioactive Mutations
In endgame public servers, player leaderboards reach the Quintillions, Septillions, and Aquintillions. At this stage, fish values scale beyond standard baseline stats through mutations. Radioactive (Nuclear) mutations, Underworld variants, and Dead modifiers elevate standard and secret models into multi-quadrillion earners.
| Fish & Mutation | Observed Income per Second | Acquisition Method |
|---|---|---|
| Nuclear T-Rex | 53 Quadrillion / sec | River spawn / base robbery |
| Vulcroth | 42–43 Quadrillion / sec | High-tier server spawn |
| Sakab / Saka Mama Crab | 39–40 Quadrillion / sec | Endgame river spawn |
| Blood Reef | 33–38 Quadrillion / sec | Event / late-game river spawn |
| Draco Pyro | 17–28 Quadrillion / sec | Late-game server drop |
| Eye of the Rift | 23–34 Quadrillion / sec | High-tier river spawn |
| Ice Trawler | 8–24 Quadrillion / sec | High-tier server spawn |
| Radioactive SCP | Variable (Quadrillion range) | Rare nuclear event river roll |
Base Defense and Preventing Thefts
Collecting rare fish carries continuous risk because other players on the 8-player server can enter your base and steal unlocked pets. Maintaining ownership requires active defensive tools:
- Base Force Field: When activated, the force field locks down your entrance. Timers typically run up to 9 minutes, after which base doors open automatically unless renewed.
- Unstealable Mutation: Fish generated or purchased with the Unstealable mutation cannot be stolen by invaders, even if the base doors stand wide open.
- Defensive Weapons: Players unlock defensive items through rebirth ranks and currency, including the basic Slap Glove, Silver Slap, Diamond Slap, Ice Slap, Flintlock, Blunderbuss, and Freeze Gun. The shop also offers Robux tools like the RPG and Supernova Sword to repel thieves.
- Vault Slots: Additional protected storage slots can be unlocked via the +2 Vault Slots gamepass (199 Robux), preventing visitors from accessing stored high-value specimens.
Frequently Asked Questions
Does rebirthing delete the rarest fish in your base?
No. Rebirthing in Steal A Fish does not clear your entire collection. It only consumes the specific fish designated by that rank's requirement (such as a Megalodon, Whale, Manta Ray, or Kraken). Any high-earning Secrets, Deep bosses, or Abyss fish in other slots remain in your base.
Can other players steal an Unstealable fish?
No. If a fish possesses the Unstealable tag, opposing players receive a system message preventing them from picking it up or robbing it from your display slots. However, player testing shows that purchasing certain pets via specific Robux prompts can strip natural mutation tags, so verify the pet's display status inside your base after acquiring it.
What is the maximum server luck multiplier?
Players can stack server-wide luck upgrades starting from 2x (99 Robux), scaling through 4x, 8x, and 16x, up to a maximum tier of 99x Server Luck (costing 8,500 to 10,000 Robux). When 99x luck expires, servers often step down to 16x luck for a timed grace period before resetting completely.
