I purchased a stars and stripes puffer abot 5 days ago. When I got him home I noticed it looked like alot of his skin on the top of his body looked scrapeddoff however he was acting fine and eating. Today he has just been sitting at the bottom of the tank his fins clamped to hiis side in a little cave in the live rock. Does anyone know what could be wrong is it something connected to his skin? It is very sad he looks miserable