Nothing selected
Click a fish to inspect. Double-click to sell.
Placing decor… click in the tank to place. Right-click to cancel.
Paused
Press Space to resume.
How to play
Core loop
Buy starter fish → feed them → they grow and can breed → collect coins → sell fish near their Peak value → buy better fish and upgrades.
Selling at peak
Each fish has a peak size where value is highest. When selected, you’ll see a Peak marker and live price estimate.
Selling too early is cheaper; too late also drops value (overgrown fish become less profitable).
Raids
Every so often, raiders enter the tank and try to eat your fish. Click raiders to damage them.
Turrets and upgrades help, but you still want to stay active.
Upgrades & decor
Upgrades improve tank capacity, feeding, collection, and defense. Decor adds style and small passive buffs
(growth, breeding, coin drops, or raid slowdown).
Controls
Click water: drop food pellet • Click coin: collect • Click enemy: damage • Click fish: inspect • Double-click fish: quick sell
Space: pause/resume
Space: pause/resume
Save
Your progress is saved locally in your browser (localStorage). Reset only clears local save on this device.
Welcome
Let’s get your first tank running.