Aquarium for Nintendo DS features 5 tanks to choose from, along with a variety of backgrounds, plants and accessories such as rocks and bridges that you can decorate with. Choose from more than 30 fish to populate your tank including clown fish, angelfish, neon tetra and guppies. Learn to create the optimum environment for your aquatic friends controlling everything from water temperature to the salinity of the tank, while keeping it clean and raising all the pets you want.