Very good action shot! If you're processing skills are good you could run the lens correction to address the chromatic aberration and then use the select sharpen tool on the salmon. Hopefully you shot it in RAW mode thus more to work with on this neat image...
I really feel this one for you. Not everyday you get an opportunity like this one. Unfortunately it is way out of focus and extremely noisy. Also if you zoom in at about 150%, at the fish tail you'll see color fringing. Always inspect you images at between 100 and 200%.