Build Your Aquarium
Build Your Aquarium is a shop management game with active fishing mechanics, creating a surprisingly deep idle game where you catch, display, and sell marine life. You run a small marine pet shop that starts with nothing but a single tank for clownfish. From there, you personally dive into the ocean, chase down fish, bag them, and bring them back to display and sell.
How to Play Build Your Aquarium
The Core Loop
- Catch fish by swimming out from the pier or beach
- Fill your backpack with as many fish as you can carry
- Return to your shop and release them into tanks
- Sell to customers at the cash register
- Upgrade your speed, backpack size, and tanks
- Repeat with better equipment and rarer fish
The Fishing Mechanic
Fishing requires timing and patience. When you swim toward a target, a red radar appears. You must keep the fish in your sights until the green stamina bar above it empties completely - then the catch is yours. Different species have different stamina levels, with rarer fish taking longer to tire out.
Progression System
- Speed Boost – You swim faster, so you spend less time chasing fish around.
- Backpack Size – Lets you haul more fish back to the shop in one trip. Fewer trips, more money.
- New Tanks – Unlocks different sea creatures. Seahorses first, then lobsters, then turtles, and so on.
- New Zones – Those marked areas on the map? Pay the fee and they open up. That's where the better fish hang out.
Build Your Aquarium Tips For New Players
- Prioritize backpack upgrades first- Fewer trips mean more fishing time and faster cash flow.
- Watch the green stamina bar carefully - The red radar only appears when you’re close enough; don’t break chase too early.
- Unlock the fourth species quickly - The boat access opens up significantly more profitable fishing.
- Use speed upgrades before tackling rare fish - Rarer species swim faster and require better mobility.
- Don’t ignore the green circle upgrades - Standing on these lets you permanently improve your character’s core stats
Frequently Asked Questions
Is Build Your Aquarium free to play?
How do I unlock new fish species?
Build new tanks by walking to marked zones and paying the required amount. Each new tank unlocks a different species.
What happens when I watch ads?
You receive one of three temporary bonuses: instant full backpack, 360° underwater view, or a speed boost.
Is there an end to the game?
The game is open-ended. Your goal is to build the most profitable aquarium possible by unlocking all species and maximizing your upgrades.
Do the fish die if I don’t feed them?
No. Unlike real aquariums, there’s no maintenance required once fish are placed in tanks - a deliberate design choice that keeps the game casual and stress-free.
