Fish Abyss: Idle Reef, Pet Sim 4+

Build the Deep Sea Aquarium of your Dreams. Collect Sharks, Whales & More!

Build a thriving ocean sanctuary splashing with aquatic life - all while you listen to the calming sounds of the ocean as whale song echoes in a distant reef.

Hundreds of Fish to Collect

Discover all the fish in the sea and bring them to your aquarium. From koi and clownfish to majestic creatures that would never fit in your fish tank, such as dolphins, sharks and humpback whales and even more exotic species - we have them all to collect and grow at the tap of your finger!

The World’s Largest Fish Tank

Dive into the world’s largest fishtank - your own aquarium sanctuary! Customise your underwater oasis with corals, seaweed, rocks and attract new species of fish to your deep sea aquarium in this relaxing underwater sim.

Journey into the Depths of the Ocean

Begin your adventure in a secluded reef as you discover your way through the depths of the aquamarine world, one tap at a time.

Relaxing Gameplay

A relaxing family simulator game full of life, build your beautiful virtual underwater tycoon where marine life can thrive - all as you listen to the zen music of whale songs in a distant reef.

Real Schools of Fish

The marine life in your reef will find friends and form schools of fish, just like real fish majestically weaving in and out of the coral (and avoiding sharks!) using our advanced behaviour simulator.

Care for Your Aqua Pets

Create the ultimate fish farm. Hatch eggs and feed your underwater creatures to level them up. Merge your fish to breed them into more special, unique pet fish.

Fish Abyss is completely free to play but some optional in-game items may require payment.

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