If they're inert, they not realy bombs now, just lumps of metal on the sea bed that will become part of the environment in a few years. Hopefully no damage to the reef, which makes the whole report nothing more than a bit of environmental hype. And that's coming from a bit of a marine ecologist, as some here may know.
Mind you,typical Harrier pilots. Ran themselves out of fuel and had to jettison their load. They're always telling us how good they are.