I agree with both Phil and Rosemarie but you cant have both crops. I think it would work beautifully either way. Your reflection is tack sharp with just enough water movement to make it interesting. Bravo!
I keep coming back to this marvelous reflection, so full of shimmering rhythms. It speaks of Iceland in its present form, because of the presence of the identification plates on either side of the boat. If would speak more of the implied dangers of the sea if you abstracted it by cropping just below the red band holding the plates. I am not saying that the cropped image would necessarily be "better" than this one -- it would just tell a different story in a more abstract form.