There are two ways to do this. You could hollow out your system and use it as a fish tank or pick up Aquazone: Life Simulator. Aquazone lets players create a virtual 3D aquarium where they can raise fourteen different kinds of tropical fish. Just like real fish your virtual neon tetras need to be fed and cared for so they don’t get sick. Aquazone: Life Simulator is scheduled for a July 27th release at the price of 3,990 yen ($35).