Brilliant shot! That curve is just gorgeous. My only critique is that those slightly darker spots (in the middle of the picture, in the upper left corner, etc.) are distracting. Was this shot through a window or something? They shouldn't be difficult to get rid of though.
I thank you all for the good comments. As for the spots I must admit the it was my mistake because endeed the lens were dirty.I was on a beach and the wind was constantly blowing small drops of water and sand on the lens...