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.
- 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.


Collect
24 species. 6 you can't buy.
Start with a cheap guppy. Work your way up to the showpieces.
Breed
Cross two fish. See what hatches.
Pair them up and you might get something no shop sells.
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Build
Then furnish the place

Plant it and walk away
Plant a sprout. Come back to a jungle.

Sink a shipwreck in it
Driftwood, pots, coral, treasure. Put it anywhere.

Put the tank on staff
A little boat feeds them while you're at work.
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.

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.