How long did you acclimate it?
IMO, your specific gravity is on the low side for these guys.
These are quite difficult animals to keep in anything but large (100g +) mature reef tanks over 6 months old. Water conditions must be pristine, and the require huge amounts of LR to graze on. They will commonly stay in one area for long periods. At this time, there is not a clear indication that it is dead. Watch for white spots, mucuous, melting, deterioration of the arm tips, "deflating" within the first month after introduction...all bad signs. At this time, I would just leve it alone. It looks OK.