I found this picture in an article on fish illnesses along with several pictures of fish i have seen in pet shops and had/have in my tank. May be a computer manipulated critter. Thanks for looking in.
Everyone's right, its a male Empire Gudgeon (Hypseleotris compressa). Females lack the red colouring so they are easy to sex. I'd say the photo is a bit enhanced but not much, in the right lighting and with a good photographer they can look almost as good as that.