Reef Zen: Aquarium Keeper

Build aquariums with coral, rocks and ruins, then fill them with fish. Breed two fish of the same family to lay an egg. The egg's colours and patterns come from both parents, and the odds of a rare fish are shown before you breed.

Visitors pay tickets while you play. A tank earns more when it is more beautiful, holds more species and has rarer fish. Spend tickets on décor, new tanks and fish from the market. You can unlock up to six tanks, and each one holds up to six fish and twelve décor slots.

Work through 30 exhibition goals. Each goal pays 20 pearls when you complete it. The goals include owning species, earning tickets and hatching eggs. Pearls buy premium décor and an instant hatch, and every goal can also be reached with tickets and rewards alone.

An egg hatches after a wait of 2 to 20 minutes, depending on rarity. An optional rewarded ad can hatch a waiting egg at once. Tickets also build up while the game is closed, for up to six hours.

The game contains ads and offers in-app purchases. Interstitial ads appear when you close an exhibition or breeding result screen. They never appear in the first ten minutes of play or during active play. Rewarded offers are optional and labelled: an instant hatch, double tickets for five minutes, and +20 pearls. Remove Ads is a one-time purchase that removes interstitial ads; rewarded offers remain. Pearl Pouch ×200 is a consumable pack that adds 200 pearls.

The game is for players aged 13 and over. It plays offline. The internet is used only for ads and for purchases through Google Play.

Recent changes:
First release.