I am disappointed in Aquaria's The Coral Reef Aquarium in that the background lacks color and all the fish are small varieties, but those with fish know-how would probably find the setting "correct" and some aspects, swaying coral and little creatures would be interesting in a zoomed view.But I highly recommend Aquaria's Natural Aquarium. Lot's of color and diversity in the background and colorful fish of all shapes and sizes for those of us just wanting an aquarium. I like the sound tracks, but are they the same on all the "Aquariums"? Strange.Big "thumbs up" for the "Natural Aquarium", but down for "The Coral Reef", unless you know what to expect.