I have a 6-7" pacu in a 55 gallon tank.(yes i know hes going to outgrow the tank soon) He spends all day sitting at one end of the tank facing the back of the tank. Hes been like this for a few weeks. Hes been really easy to spook lately as well. If i go anywhere near his tank he freaks out. If you have/had pacu and could possibly give me some advice on what to do to bring him out of his shell id appreciate it.