A free app for Android, by Sam Live Wallpaper.

This application is a collection of beautiful and realistic live wallpapers. The backgrounds are HD, and they are optimized to save memory. You can set the wallpaper on your home screen and/or lock screen.

This simple application can upgrade the look of your mobile device with just a tap. The application is easy to use. All you need to do is download it, set it on your home screen, and choose between the different categories of backgrounds. There is a variety of animals, like sharks, dolphins, whales, and more. The main feature of this Live Wallpaper app is the huge shark swimming effect.