Abstract: New and improved molded magnetic geometrical components are used as underwater ornamentation to form the scenery in aquariums and other aquatic displays. These modular imitation rocks and/or other shapes, when added to an aquarium will create a natural setting for the fish. These rocks, gravel, reefs, and other water icons are constructed, in various shapes, sizes, and colors, out of magnetizable materials, having north and south magnetic poles. To form the display, a two-dimensional background structure of the display is constructed from a ferromagnetic material. A first layer of the shaped molded magnetic components are then placed on the background structure, with the magnetic component's north and south poles properly aligning to firmly hold the components on the background structure. Then the various molded magnetic components are stacked on to the first layer of molded magnetic components to construct a three-dimensional scene.