That reminds me a lot of my irridescent shark (my wife wanted it. I wanted no part of it) when he got hurt. For anyone who doesn't know, irridescent sharks are a major headache for the home aquarist. I wouldn't recommend that anyone buy them. Pierre (that's the shark's name) had a habit of running into the sides of the tank and the decoration in the tank. His face was covered in open wounds that looked just like this guy's pics. I treated him with melafix in a hospital tank. It cleared up in a little over two weeks of treatment. Now he's doing quite well in my 55 gallon, and I plan to move him to a small pond in the very near future.