One thing that can't be argued with is the image quality of all of the HD Moods series. These really are gorgeous offerings in terms of clarity and color. I know I personally loved the underwater scenes of Planet Earth best, and Aquarium, while obviously not providing the breadth and depth of that epochal series, approaches the image quality of Earth in its more subdued ambitions. Fish are scene so clearly that their translucence is amazing at times. While none of these fish is eye poppingly colorful, the coral and surrounding undersea environments really do make up for it, with luscious oranges and blues populating the screen. The subtly shifting light is also a delight to watch, giving a really nicely gradated palette as shafts of luminescence waft through the water.