I had thought about taking them from my desplay once cleared after moving a contaminated rock to a different 20 gallon or so and then trying to keep them alive by ticking off the aptasia really bad and spreading it like mad in a isolated 20 to 30 gallon. I ended up plucking them out and giving to my local fish store for there aptasia infestation.Have seen filefish as well doing nothing, have seen eating the aiptasias really but easily get a taste of other corals as well, for the peppermint shrimps is a bit different, they'll taste other corals probably when they get very hungry. But about the Berghias...., there isn't any doubt! For sure they'll take everything off for no time.
2 years ago had a farm already for Berghias..., unfortunately after 6-7 months raising them I contaminate the main-display tank probably with eggs, and in nearly month and half I got there no aiptasia (I do spread the aiptasias as mad to be honest with you, using them as a source of food for the berghia farm)..., soon I'll try again, once I get constant source of aiptasia to feed the berghias.