Fish are like people IMHO
. You have good and bad of each kind. I have a orange and white oscellaris with a black back and a black and white saddleback with really bright yellow fins. They where both so unique I had to try. They do not fight at all. They could though. When I go to a local fish store as everyone probably already knows they usually have ten times as many fish in tank as they should. I see this as a good opportunity to see how territorial and aggressive a fish is to others. This is all just my opinion I'm a newbie.