Clowns damaging a duncan

[CT Reefer]

Hello all: I have a pair of ocellaris clowns that have taken up residence in one of my duncans. The duncan has about 15 heads and is starting to show stress. One of the upper heads (where the clowns primarily reside) is completely gone and several others have retracted tentacles. Any recommended solutions to this problem?

 

[salgas]

If you can try covering your Duncan with something.
Like a cage keeping the clowns away but still allowing flow and food in.
This way they'll eventually look for another spot giving the Duncan time to recover .