I just bought an RBTA 2 days ago and he looks completely fine... Closes at myth opens as soon as lights turn on I spot fed him today and he ate just fine... Now he is closed up... I also have a pair o black ocellaris in there... The are bigger than him and were swimmin by him... Did they make him close up or is it normal fri him to close After eating... It was only a small cube of mysis shrimp that he ate