I believe that it is up to the individual fish, but I would not suggest it if you can't seperate them if they do fight. Do you have a second tank or would the LFS be willing to do a trade or refund if it doesn't work out. Make sure your LR is mature and plenty of it. Personally I am housing a coral beauty and a flame, also a koran and a grey large angel. No problems for over a year. Good luck.