... is there a way to change the sea behind to make it stand out better....
..I think it is hardly likely you will get too much detail back from them..
There should be plenty of detail in there, I just had a quick play with the JPEG and you can pull it back quite a bit just with a basic curves adjustment.
The original file, especially if it was shot in raw, would be perfectly salvageable I think.
Well James as the OP has edit enabled, perhaps you could show us what you have achieved.
It would be greater but imo you would still not get enough detail back from the blown whitesDon't really see the point with a massively compressed JPEG, as it's just going to look poor. That is fair enough
But you can tell there is detail there, which would be greater in the original file.