You have already brought a mega cool 10megapixel, slim as an anorexic supermodel camera but if you want to take photos underwater you have to leave it on the beach and get a cacky underwater disposable that takes really shabby photos.
Well not any more. The Aquapac 420 Hard Lens Camera Case was specifically designed for Mini Digital Cameras with zoom lenses
Be careful with the watertight locks. Do them up slowly and carefully. If you are in any doubt about their functioning, remove the camera, put some paper inside, seal the bag and take it into the water. If the paper is still dry after 10 minutes splashing around, you can safely use the bag with your camera.