I have (2) Perc. and (2) clarki in a 90 gallon each set is a mated pair with a long tent anemone at each end of tank (one for each pair) They do not fight at all. But they will not share or trade anemones. I started my tank with the percs. and added (1) clarki 3 months later and another clarki about a month later. I also have a majestic angle, potters angle, flame angle, (2) blennys, (2) gobbies, and lots of crabs & shrimp with 100 pounds of live rock.