Aquarium of Surprises

Another coin bubble floats past, your coins tick over, and you think: just one more fish. That's how Aquarium of Surprises gets its hooks in. Each extra fish of the same kind costs a little more, so every purchase feels like a small, tasty decision.

The tank runs itself. Fish swim on their own and earn coins while you pick what comes next from 10 kinds of fish, 7 plants, 7 decorations and 11 upgrades. Events turn up quietly: a drifting chest, glass that needs cleaning, or one of 6 rare visitors who join a collection of 16 creatures. Pearls unlock special decorations and 4 aquarium themes, so there's always a shiny next thing to aim for.

Nothing here nags you. No timers, no pressure, no forced ads. It's a gentle pick for fans of fish aquarium games and a good fit among casual games when you want something calm. The graphics are vector, the sound is synthesised in your browser, and the whole game is under 150 KB.

Grow your tank by earning coins, spending them in the shop and collecting the rare visitors.

Watch the tank. Every fish earns coins by itself, so there is nothing to click. The top bar shows your coins, income per second, pearls and aquarium level.

Open the Shop to spend coins. The tabs are Fish, Plants, Decor, Upgrades and Themes. Each extra fish of the same kind costs a little more than the last.

Tip: keep an eye on income per second in the top bar to see what each purchase actually changes.