Can you freeze salmon after being cooked?

Of course you can freeze just about anything that can be cooked, but fish in particular is a delicate protein. The freezing causes water crystals inside of the flesh to take a shape with sharp and jagged edges. This can break down the flesh of the fish (or other frozen item) and leave it softer when it is defrosted. The difference in the salmon may be undetectable to some, but quite obvious to the avid seafood eater. In the commercial world this sort of thing would be flash frozen (like it probably was on the boat to begin with) which is a process that freezes so quickly that the crystals dont have time to form such large and sharp shapes. For best results with your salmon cool it completely first, place it in a ziploc bag, and put it in the back bottom (coldest) place in the freezer. If you can, avoid opening the door for maximum chill. Good luck!

In case you are curious i am currently a chef, and have been a personal chef in the past.