Down at the coast yesterday I was trying to photograph a bird flying above the sea when I was aware of movement in the water. I forgot about the bird and concentrated on the movement, watching for ages as this thing flopped about on the surface. I was baffled by what I was seeing, something twigged in my head hey that has to be a Sunfish. Today I did some research and yep I can confidently say it was a Sunfish.
A picture showing a fin sticking out of the sea. Grey sea and various shades of grey fin