What to do , what to do????

[Namscam]

well I ve finally found it ...after looking at my fish tank for hours on end I have finally done it It was behind some rocks buried under the sand...poor thing looks soo skinny and decolured ...I saw a few of its polyps when I was looking at the xenia that I got from chad and notice there was one too many polyps ..I hope this thing makes.I have place it on top of my rocks near the top in an area with moderate flow in hopes of reviving him...