Blown63Chevy I know you have a few. I plan to put about 20 in my 400. Can anyone tell me how they interact? Do they establish a pecking order? Do any pair up? Got any pics? These are absolutely my favorite fish. I can't wait to do this. They will be the first thing I add. I need to get the tank first which should be soon. I have one in my 30 cube and he's so entertaining.