I don't know what it is, but it doesn't look like a red sea cleaner wrasse (Larabicus quadrilineatus) juvenile or adult.
http://www.fishbase.org/Summary/Spec...y.php?id=25788
edit: if you really want to know what this thing is, post the pics up on the reef fish forum on RC. Some of the big wrasse fanatics hang out there. a clearer pic would help too.