Free, without any advertisements.
Features full 3D high definition photo realistic animation with Open GL ES 2.0.
You can choose between two elegant water themes, set up the "godrays" intensity and choose optimal frame rate for your device. With the latest version you can also change the caustics pattern drawn by sunlight onto seabed and also appearance of waves on surface.
Hope you will enjoy it._____
How to use it: press "Home" > long press on background > choose "Live Wallpapers" > select "Under the Sea Live Wallpaper" from list.
This is a live wallpaper and not an application, so you will not see it as an icon installed under applications. It is only available in "Live Wallpapers" menu.