+1 I'm with Hunter and fishfirst
I have a Kwazulu fairy wrasse and it looks nothing like the OP's fish. First, the anal fin is too large to be a Kwazulu, plus it (along with the dorsal fin) is the wrong color. Next the Kwazulu has a yellow/orange face/ opercular region that this fish does not possess. Lastly , and in the picture provided it is very subtle, but the tail of the fish is the pic is black with hints of blue. This is also something not found in the Kwazulu wrasse, but is found in C. filamentosus. Here are a couple of pics of the filamented fairy wrasse for reference as I think it will help, the process.
C.filamentosus (notice the color of the dorsal/anal fins relative to he color of the body. Next notice the color of the tail.
http://content64.eol.org/content/2011/06/03/04/88894_580_360.jpg
And here's another one of the filamentosus. Both pics were taken from the web for comparison purposes.
http://importadoramarina.com/images/peces/img258.jpg
Hope this helps.