If you are a fan of the marine life and want to spice up your desktop, you can download Hammerhead Shark Background wallpaper. These backgrounds can be downloaded for free and will make a great addition to your home screen. They can be customized to fit your needs. You can also use an extension that will shuffle your Shark background wallpaper every time you open a new tab. There are several features to choose from, including customizing the search function and the weather indicator. This theme will also automatically show you the current date. It will even let you hide the time and date in your settings.