Reef Slide Sort

A little slide. A little more life.

Guide fish crates through exits with matching colors and symbols. Every cleared board sends fish swimming free and restores a permanent coral site in your Living reef atlas.

Explore 40 gentle stages in a calm 3D underwater world. Make room for longer crates, open shell and reef locks, and learn to work with currents one step at a time.

Take your time: there is no timer and no payment needed to clear a stage. Retry immediately, undo your last three moves, or use a free hint when you need another way forward.

Grow five distinct 3D habitats, from branching Ripple Garden to the flower-shaped coral of Star Sanctuary. Compare your restored reef with its quiet beginning, and revisit unlocked sites to play again.

Earn bubble coins by restoring reefs and choose cosmetic reef and fish styles. Optional rewarded ads offer extra cosmetic coins; they are never required to progress. Advertising choices, sound effects and reduced motion are available in Settings.

Progress is saved on your device. Available in English and Japanese.