When I was taking this photo, I had it on the manual 'M' setting. This was what made the sea look misty as it was slow shutter speed. The first thing I did when I edited this was turn it black and white. After that I used the curve tool to darken and brighten some parts.
I went back to this photo and edited it a bit more. I used the burn tool to darken some areas on the sea so it would be visible. I also used the dodge tool to brighten some parts up.