Fishful Thinking

Fishful Thinking

Build the aquarium you always wanted.

Fishful Thinking is an idle aquarium sim. Stock a tank, plant it out, furnish it however you like — then close the app and let it live. Your fish keep growing, breeding and earning while you're gone.

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  • 24fish
  • 15plants
  • 5styles
  • 0ads

Yours will look nothing like this.

Every fish, plant and ornament here was picked and placed by somebody. Two players who start on the same day end up with tanks that share almost nothing.

An aquarium with an angelfish, goldfish, koi and betta swimming over a shipwreck, treasure chest and coral
An aquarium with a crown betta and guppies among tall plants, an anchor and a sunken wreck

Collect

24 species. 6 you can't buy.

Start with a cheap guppy. Work your way up to the showpieces.

Prism Guppy
Prism GuppyBreed only
Crown Betta
Crown BettaBreed only
Opal Koi
Opal KoiBreed only
Celestial Discus
Celestial DiscusBreed only
Blue Royal Arowana
Blue Royal ArowanaBreed only
Red Royal Arowana
Red Royal ArowanaBreed only
Guppy
GuppyTier 1
Neon Tetra
Neon TetraTier 1
Zebra Danio
Zebra DanioTier 1
Corydoras
CorydorasTier 1
Goldfish
GoldfishTier 1
Black Molly
Black MollyTier 2
Swordtail
SwordtailTier 2
Dwarf Puffer
Dwarf PufferTier 2
Betta
BettaTier 2
Pleco
PlecoTier 2
Angelfish
AngelfishTier 2
Rainbow Shark
Rainbow SharkTier 3
Koi
KoiTier 3
Archerfish
ArcherfishTier 3
Discus
DiscusTier 3
Giant Gourami
Giant GouramiTier 4
Arowana
ArowanaTier 4
Freshwater Stingray
Freshwater StingrayTier 4

Breed

Cross two fish. See what hatches.

Pair them up and you might get something no shop sells.

  • Guppy + Black Molly = Prism Guppy
    Prism Guppy45m
  • Koi + Goldfish = Opal Koi
    Opal Koi3h
  • Angelfish + Discus = Celestial Discus
    Celestial Discus6h
Greedy Hardy Shy Fertile Guardian Soul Glimmer Voracious Ancient

Build

Then furnish the place

An amazon sword plant

Plant it and walk away

Plant a sprout. Come back to a jungle.

Java fern Anubias Red ludwigia Vallisneria Grow light
A sunken shipwreck

Sink a shipwreck in it

Driftwood, pots, coral, treasure. Put it anywhere.

Driftwood Clay pot Coral Anchor Treasure chest
The auto-feeder boat

Put the tank on staff

A little boat feeds them while you're at work.

Filter Heater Aerator Coin magnet Hatchery

Style

Change the floor, change everything

Black basalt makes a neon tetra look radioactive. Bleached coral sand makes the same fish look like a postcard.

River BedFree
Reef Flat120 pearls
Volcanic Sand140 pearls
Tidal Shallows110 pearls
Slate Wash100 pearls
A red piranha

And it's alive

It's not a screensaver.

Feed them and keep it clean and they thrive. Let a predator in and you lose one for good.

Be first in the water

One email the day it launches. Nothing before it, nothing after it.

Email me when it's out