Aquaidle is a relaxing and charming Steam Inventory Based  free-to-play idle aquarium game where you can build, manage, and customize up to 100 living aquariums — each filled with unique fish that earn money for you even while you're away!

Earn Money Your Way

Sit back and unwind as your fish generate income automatically, or take a more hands-on approach by feeding them to boost your profits manually. Whether you prefer a calm idle experience or an active clicker-style loop, Aquaidle adapts to your playstyle — your aquariums, your pace.

Aquarium Upgrades & Progression

Unlock new aquariums, expand their capacity, and invest in powerful upgrades to dramatically increase your earnings. Grow from a small fish tank keeper into the owner of a massive underwater empire!

2,400+ Unique Fish to Discover

Dive into a huge collection of aquatic life: over 160 base species , each featuring 5 unique variations and 3 size types , resulting in more than 2,400 collectible fish. Every discovery feels exciting, and filling your aquariums with rare combinations becomes a fun long-term goal.

Build & Personalize Your Aquarium World

Manage up to 100 customizable aquariums , each of which you can decorate to match your mood and style. Create peaceful landscapes, vibrant coral paradises, or themed tank collections — your creativity brings your aquatic world to life.

Steam Inventory Based Drops

Aquaidle uses the Steam Inventory system to deliver free daily and weekly drops! Collect special fish, decorations, and exclusive items simply by playing and returning over time.

Player-Driven Trading Economy

Trade freely with other players! Buy, sell, or exchange the fish you find to complete your collection, hunt for rare species, or earn some extra currency on the market. It’s a living, evolving economy powered by the community.