Check this out. I have a huge Brown Carpet anenome, that has eaten several clown fish. Countless shrimp, damsel fish, chromis, and anything else that gets close to it. However, I have a Red sea sailfin tang that goes down into the anenome, and takes shrimp out of the carpet every time i feed it. I think the carpet likes the sailfin, all of the other fish stay away from it, even my replacement clowns. Thing is I got the carpet from my cousin who has a 90 gallon tank. The capet outgrew his tan, so he gave it to me. In his tank, he had 3 true percs hosting in it. It eats every species of clown that has gown into it in my tank. But not the Tang. This has been going on for about 7 months.