Hi, A lot of times, they are skidish at first. Once they get used to your routine and everything and everyone who is outside his tank, he feels secure and safe and is always happy to see you. On the other hand, if he hasn't got to feeling safe and secure and happy fairly quickly, he may be either sick and need some medical attention or you may need to rethink your approach to feeding and tank cleaning schedules and anything else in his environment that may be causing distress in order to put him in a healthy frame of mind and enjoy his life. Do you have dogs or is there loud noise or sunlight that is too bright or other things around him that you notice like that?