In the Roblox tycoon simulation Steal A Fish by MY FISH FRIEND, fish prices range from entry-level common catches costing $200 up to endgame deep, cosmic, and nuclear rarities priced in the trillions and sextillions. Fish serve two primary purposes: generating passive income per second when placed inside your base slots and meeting the specific consumption requirements needed to rank up rebirths.

Prices and income stats fall into two categories: static flat-rate producers that output fixed cash per second, and secret percentage-based fish that dynamically scale off the highest-earning flat-rate creature in your collection.

Steal A Fish River Purchase Prices and Income Rates

Fish spawn from the river tunnel and travel downstream toward a disposal boat. Players can buy fish directly from the river if they have adequate cash and open base slots. Other players can also outbid or steal purchases along the track unless base defense measures or unstealable mutations are active.

Fish NameRarity TierPurchase PriceBase Income / MultiplierKey Use or Requirement
Basic Starter / JellyfishCommon$200$10 / secEarly starter income
TurtleCommon$350 – $500~$15 / secRebirth 1 requirement
EelCommon / Uncommon$200$35 / secEarly cash generator
Void PufferfishVariant$250Passive cashEarly budget purchase
Tralalero / TraloCommon / Uncommon$600 – $700$12.50 – $120 / secRebirth 2 requirement
Red CrabCommon / UncommonVaries by trackPassive cashRebirth 2 requirement
ShrimpCommon / Uncommon$1,700$55 / secEarly progression
BlobfishRare$10,000Passive cashRebirth 3 requirement
ClownfishRare~$18,000Passive cashRebirth 3 requirement
Saw SharkEpic / Legendary$100,000 – $350,000Up to 2.9k / sec (Void)Rebirth 4 requirement
Nuke Fish (Atomic Fish)Legendary$1.2M – $2.75MFlat high cashRebirth 4 requirement
Manta RayLegendary$5,000,000 ($5M)$10,000 / sec ($10k/s)Rebirth 6 requirement
MegalodonLegendary$2,500,000 ($2.5M)Flat cashRebirth 5 requirement
Regular WhaleLegendaryTrack spawn$3,500 / secRebirth 5 (requires 2)
Infected BarracudaLegendary Variant$2,000,000 ($2M)$4,500 / secPre-mutated unstealable
KrakenMythic$50,000,000 ($50M)$55,000 / sec ($55k/s)Rebirth 7 requirement
Blue DragonMythic$95,000,000 ($95M)High mythic cashMythic milestone
Loch Ness MonsterMythic$100,000,000 ($100M)High mythic cashRebirth 7 requirement
Zombie WormMythic$125M – $250BHigh mythic cashHigh-tier flat earner
Godzilla FishMythic$135,000,000 ($135M)High mythic cashMythic index entry
Cosmic Sea EaterCosmic$1,000,000,000 ($1B)$510k – $5M / secMid-endgame bridge
LeviathanCosmic / Deep$75,000,000,000 ($75B)High cosmic cashRare conveyor spawn
Mouth TitanDeep$50,000,000,000 ($50B)$9,000,000 / sec ($9M/s)Flat deep producer
Deep World EaterDeep$10 Trillion ($10T)1.5 Billion / sec ($1.5B/s)High-tier flat earner
Deep Mutated BossDeep$50 Trillion ($50T)5 Billion / sec ($5B/s)Core anchor for % pets
Abyss SeekerAbyss97.5 QA ($97.5 Quad)11 QA / secEvent / High tier flat earner
Radiated Nuclear MoonNuclear967 Sextillion4.85 Quadrillion / secUltra-endgame flat earner

Purchase costs on lower-tier fish like the Turtle can vary slightly between $350 and $500 depending on active game versions and track scaling. All flat-income producers deposit earnings directly into individual base collection pads.

Percentage-Scaling and Secret Fish Values

Unlike standard fish that yield flat cash per second, secret and special promotional fish generate a set percentage based on the highest flat-earning fish currently placed in your base. If you replace an older anchor fish with a stronger flat earner, all percentage-based fish immediately recalculate and boost their yields.

  • Secret Spider Fish: Produces 75% of your best fish's income rate.
  • Nightmare Blobfish: Costs $2 Billion in cash and produces 90% of your best fish's income rate.
  • Orca / Orcalero Eater: Costs 1,500 Robux as a limited fish and yields 100% to 150% of your best fish's income rate.
  • Hungry Tung Tong: Secret fish costing $50 Billion in cash; yields 120% of your best fish's income rate.
  • Hungry Deer (99 Nights in the Forest): Secret fish costing $50 Trillion in cash (or 4,000 to 5,000 Robux); outputs 150% of your best fish's income rate.
  • Demogorgon Worm: Promotional fish costing 1,500 Robux; outputs 150% of your best fish's income rate.
  • Cthulhu Fish: Secret admin/event fish producing 250% of your best fish's income rate.
  • Nuclear Secret Variants: High-end event spawns yielding up to 400% of your best fish's income rate.

Because these multipliers rely completely on your best standalone flat-rate earner, pairing multiple percentage fish with an anchor like the Deep Mutated Boss ($5B/sec) or Abyss Seeker (11 QA/sec) creates exponential base profits.

Track Mutation Rates and Value Modifiers

Fish spawning along the conveyor tunnel have fixed baseline probabilities of carrying unique aura mutations. Mutation boards posted in the game list the exact chances for incoming fish:

  • Unstealable (7.5% spawn rate): The fish cannot be picked up or stolen by rival players, even if your base gate is left wide open.
  • Gold (5% to 7% spawn rate): Adds a golden appearance and increases base payout values.
  • Void (2.5% spawn rate): Applies a dark visual effect and stat modifications.
  • Magma (0.5% spawn rate): Rare red elemental variant offering boosted earnings.
  • Dead (0.2% spawn rate): The rarest natural conveyor mutation, displaying a skeletal crimson appearance.

Special environmental events such as Blood Moon, Rift Event, Aurora, and Rain can introduce secondary modifiers or weather-linked mutations like Lightning, Inferno, and Blizzard.

Rebirth Costs and Fish Requirements

Rebirthing unlocks upper base floors, additional storage slots, weapon upgrades, and permanent passive earnings multipliers. Rebirthing consumes only the specific fish listed on the rebirth board; all other high-value fish stored in your base remain intact.

  1. Rebirth 1: Requires 1 Turtle and $500 cash. Unlocks the pistol tool, increased force field duration, and higher offline earnings.
  2. Rebirth 2: Requires 1 Crab, 1 Tralalero, and cash. Awards increased walk speed and the golden slap tool.
  3. Rebirth 3: Requires 1 Blobfish, 1 Clownfish, and $25,000 cash. Unlocks access to the upper base floor structure and increased money multipliers.
  4. Rebirth 4: Requires 1 Saw Shark and 1 Nuke Fish (Atomic Fish). Unlocks base floor slots 7 and 8, walk speed boosts, and the diamond slap tool.
  5. Rebirth 5: Requires 2 Whales, 1 Megalodon, and $15,000,000 cash. Unlocks freeze weapons and defensive tools.
  6. Rebirth 6: Requires 1 Manta Ray, 1 Bananini, and 1 Goldfish. Awards ranged weapon upgrades and expanded storage.
  7. Rebirth 7: Requires 1 Kraken, 1 Loch Ness Monster, and $1 Billion cash.
  8. Rebirth 8: Requires 1 Infected Whale, 1 Robeladon, 1 Axolotl, and $250 Billion cash.

Cash Track Boosters and Official Store Passes

Players can speed up the conveyor flow using cash-based buttons placed right along the track, or purchase permanent utility items from the native Roblox game store:

  • x2 Fish Speed: Costs $100,000 in-game cash; doubles the swimming movement speed of spawning fish.
  • x2 Fish Spawn: Costs $500,000 in-game cash; cuts conveyor spawn intervals in half.
  • +2 Base Slots (199 Robux): Permanently adds two extra fish slots inside your base.
  • x2 Speed (199 Robux): Increases player base movement speed.
  • +2 Vault Slots (199 Robux): Adds two additional protective slots to the vault.
  • x2 Money (399 Robux): Applies a permanent 2x multiplier to all fish earnings.
  • Invisible Cape (799 Robux): Grants invisibility to sneak into opponent bases.
  • Admin Commands (3,999 Robux): Unlocks the admin command console (fly, freeze, jail, and teleport).
  • Temporary Server Luck Boosts: Tiered Robux purchases starting at 2x Luck (99 Robux), scaling through 4x (299 Robux), 8x (800 Robux), 16x (2,000 Robux), up to 99x Max Luck (8,500 to 10,000 Robux).

Frequently Asked Questions

Do I lose all my fish when I rebirth in Steal A Fish?

No. Rebirthing only deletes the specific fish designated as requirements for that rebirth rank. Any high-earning mythics, deep fish, or secret percentage pets stored in your remaining base slots are preserved.

What is the rarest natural mutation on the river track?

The Dead mutation is the rarest baseline track roll, carrying an official spawn chance of 0.2%. Magma sits at 0.5%, Void at 2.5%, Gold at 5%, and Unstealable at 7.5%.

How do percent-based fish calculate their cash generation?

Percent-based secrets like the Hungry Deer (150%) or Hungry Tung Tong (120%) calculate their earnings directly from the single highest flat-rate producer placed in your base. If you place a Deep Mutated Boss producing $5 Billion per second, a 120% Hungry Tung Tong will output $6 Billion per second.

Can unstealable fish be stolen if my base shield is down?

No. Fish that roll or carry the Unstealable tag cannot be stolen by opponents, regardless of whether your base force field is open or expired.