Arc Aquarium

Collect fish, decorate your tank, earn money, and build an aquarium that grows over time.

ARC Aquarium is a cozy 2D idle aquarium simulation focused on collection, decoration, and relaxed progression. Play actively for a few minutes or leave it running in the background — your fish continue to grow while you are away.

🐠 Collect Fish

• Collect 85 unique fish species with different visuals, values, and level requirements
• Collect 85 unique fish species with different visuals, values, and level requirements
• Feed your fish to help them gain EXP and grow visually
• Watch gentle swimming, tail movement, and bubble effects

🪸 Decorate Your Aquarium

• Unlock and place 86 different decorations
• Move, resize, and sell decorations freely
• Customize depth and layout with smooth visual layering
• Change the mood of your aquarium with 9 different backgrounds

📈 Relaxed Idle Progression

• Earn money by growing and selling fish or decorations
• Level up to unlock new fish, decorations, and backgrounds
• Manage tank capacity as your aquarium expands
• Offline progression lets your aquarium keep moving even when the game is closed