Can you shoot some pix like the last two, but back the camera off some or tell your camera to focus on the fish? They aren't in focus. A good profile head shot would help too.
From what I can see, if I HAD to guess, it could be Scorpaena brasiliensis, but it might also be Scorpaenodes parvapinnis. My money would be on brasiliensis, but it could be something totally different, so good pix are a must.