Royal Gramma and BlackCap VS False Percs

I believe that the clowns are showing that they are a pair and not to come to close to their area. My clowns do this any time I have added fish to my tank they settle down and life goes on. as long as the new fish do not move in to the clowns rock structure or hosting spot. That does also mean the area they tend to stay closest to, it could be the top of the tank a little rock on the bottom of the tank and so on .
Clowns will host anything, even the surface of the water and equipment.

Bill