Aquarium for the Nintendo DS is a virtual pet simulation game with a focus on fish and aquatic life maintenance. Players can design and manage their own digital aquariums, choosing from a variety of fish species and decorative items. The game emphasizes nurturing and caring for the fish, monitoring their health, and ensuring their environment is clean and well-maintained. Gamers can interact with their underwater pets by feeding them and observing their behaviors. It fits squarely into the simulation genre, offering a peaceful and engaging experience for players of all ages interested in marine life.