Kind of off topic, but I just had an emerald crab ravage my sun coral, has never touched a coral before. I think it really varies from specimen to specimen, as far as the dwarf angles go.
My Coral Beauty has developed a taste for my Kryptonite Candy Cane but so far he has not touched any of the other colrals yet. I have covered the Candy cane with a clear bottle and I have even tried moving it to another part os the tank and he just can't help himself. The KCC is my wifes favorite coral and she is pissed. So beware there is always a chance that they can aquire a taste for some corals.
Good Luck