Mine is the exact same way. If I'm in the room he is in his cave. Sometimes when I get back from school I walk into my room and see him floating in the middle of the tank. If I try to walk up and admire it, it runs off to it's cave at breakneck speed. He's been with a senegal that is a full 2 and 1/2 inches smaller than him, and believe it or not he has actually retreated to his cave when the senegal whizzes by him.