Deep Aquarium - Kiseki no Shinkai ('The Miracle of the Deep Sea') invites players to build and maintain a virtual aquarium, collecting marine species -many from the deep sea, uncommon in this kind of simulator- and caring for their habitat, within the small but steady vein of aquarium games DS kept alive thanks to its touchscreen.
It's a contemplative experience rather than a competitive one, designed for an audience that enjoys the calm of watching virtual fish more than any demanding progression system.

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