I do have a qt, but unfortunantly he was to far gone by the time i moved him over...he had been hiding under a rock for days so it wasnt another fish that got to him...he did fine when i first got him destroyed my tank for about a week got my sand all nice clean and white then went into hiding...came out like this yesterday snapped a pic then scooped him out..didnt take long after that for him to go...needless to say thats my last goby...the one before that jumped out the qt the night before he was ready to be moved over to main tank...was never seen again...my wife has a cat so we have an idea where it went...lol..well thanks for the input, my other fish corals and inverts seem to be doin fine so im gonna assume it wasnt contagious...but continue to try and find out wat it was...