"My Aquarium 2" allows you to place freshwater fish, saltwater fish, deep-sea fish, and other sea creatures together in a single aquarium to raise and observe, regardless of their real-life relationships. You can also exchange aquariums with Wii Friends.

You can decorate your aquarium using rocks, seaweed, driftwood, and more. You can even decorate the glass, or change the lighting setup.

You can set a special date on which the fish will perform a special dance. For example, you can send an aquarium to a Wii Friend with their birthday set as the special date, and on their birthday the fish will do a special dance!