Seahorse Sanctuary
A living seahorse aquarium that keeps real time. Feed them, test the water, learn the rhythm of care — with no real animal at risk.
Lives in real time
No sped-up clock, no energy bars. Your tank keeps the same time you do — feed in the morning, check the water in the evening, come back tomorrow.
Care like the real thing
Ammonia, nitrite, nitrate, oxygen, pH, salinity — the chemistry is real, and so are the consequences. What you learn here is what a living tank demands.
Free, truly
No ads, no subscriptions, no purchases, no timers waiting to be skipped. The whole game, for everyone, forever.
Inside the tank
Real screens from the real game — nothing staged.
Why a simulator instead of a real tank?
Live seahorses are among the most difficult animals you can keep in a home aquarium. They need precise water chemistry, steady temperatures, calm water flow, live food several times a day, and careful attention to even small changes — many are also wild-caught, so bringing them home puts a fragile animal at real risk.
Even experienced aquarists lose seahorses while learning. This simulator lets you practice the whole rhythm of care — feeding, testing water, cleaning the filter, watching for stress — with no real animal depending on you.
Everything runs on real-world time, just like a true aquarium. If you ever decide to keep real seahorses, the habits you build here will already be yours.
How to play
Right now, in your browser
The whole game runs here on the web. It saves on your device and keeps living while you're away.
Open the tankOn iPhone
A native iPhone app is being prepared for the App Store — the same tank, in your pocket, fully offline.
On Android
Planned once the iPhone app is settled. Until then, the browser version works beautifully on any phone.