Al I just purchased what u can say is a large hippo tang. My params are great however the tang has been picked in mlby my yellow tang. They seem to be getting a long better and the hippo has seemed to hve foun a rock he thinks e hides under but u can still see him lol. I'm concerned ia this normal behavior for the hippo tobhide sideways and sit there for a while, is he doing I because he is comfortable there or is he stressed? I got a divider to seperate the fish if needed but havnt seen aggression lately