This is the 800 x 600 wallpaper version of the same image featured here. If using Windows, you may be able to right-click directly on the image above and select "save as wallpaper..."; another way is to download the file directly to your computer (in Windows, right-click...save as...), then go into Start...settings...control panel...display to set the appropriate-sized file as your wallpaper. If your desktop is 1024 x 768 pixels, try the largest size, below right. The thumbnails show how comparatively larger this size is, compared to 800 x 600 (left).
Identification of anemoneshrimp: Periclimenes holthuisi