Merge Fish : Idle Aquarium

Dive into a peaceful underwater world where adorable fish friends are waiting for you!

Grow new life from coral, merge fish to discover rarer and more beautiful species, and build your own relaxing idle aquarium—your cozy ocean sanctuary.

Ready to start your chill aquatic journey?

Game Features

1. Strategic Merge System

• Level Up:

  Combine two identical fish of the same grade, and watch them evolve into a higher-tier fish!

  The higher the tier, the more coins they generate.

• Random Swap:

  Have two fish with the same tier but different species?

  Merge them to get a brand-new random fish of the same tier!

  Keep merging strategically until you find the fish you want.

1. Complete Your Own Fish Collection

• From tiny, adorable 1-star fish to majestic and dazzling 5-star species,

• Every time you merge or discover something new, your collection grows.

  Can you complete the entire aquarium compendium?

1. Idle Gold That Grows While You Rest

• Your fish are always active!

  They generate gold every 3 seconds based on their tier.

• Use your earnings to upgrade and expand your aquarium.

1. Coral Upgrades & Aquarium Expansion

• Coral Upgrade:

  Want to summon more fish at once?

  Upgrade your coral to increase your summon capacity.

• Additional Aquariums:

  Too many fish in one tank?

  Expand your space or unlock new themed aquariums to manage even more fish.