This past friday I went to petco and saw this red sea star and seeing as it was only $9.99 I figured I would buy it. Well it has barely spent anytime in the actual live sand even when I pick him up and lay him there he just ends up moving to the same exact spot. He always moves to the edge of the water line with part of his body curled so his mouth is almost at the water line. This didn't worry me too much until today when I noticed a weird bubble covering his mouth, its like a pinkish bubble formed over it and the edges of his legs are curled. I have no idea if anything is wrong with him. I've tried to do some research on him but I can't seem to find any really good data. I've tested my water (with strips i know not very accurate) and everything seems to be in the normal range. Also, he has always been very active (moving everywhere on the tank walls, even near the heater!) until this thing formed. Does anyone have any ideas?