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James’s Nature Aquarium

Build a living tank the way Takashi Amano did, and keep it in balance.

Week 0 Empty tank
Tap anything in the tank to learn about it, or use the lens to see the invisible.

How your tank works

Live from your tank this week

Experiment lab

Test one change at a time

Real scientists change one thing and keep everything else the same. The lab copies your tank twice: tank A stays as it is (the “control”) and tank B gets one change. Then both live the same weeks. Your real tank isn’t touched.

Tank journal

What happened, and why

About Takashi Amano (1954–2015). A Japanese photographer and aquarist who invented the “Nature Aquarium”: underwater gardens that look like real landscapes and work like tiny ecosystems. The Amano shrimp is named after him — he made it famous as an algae eater. In this game the chemistry is simplified so a week fits in a few seconds, but the cause-and-effect is real.

Version 3.4 · Launched · The App Shelf · Next game: Mid-Autumn Mayhem · Share your thoughts · Report a bug · Know someone who might like this?

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