Peppermint shrimp can/will too, just like the emeralds. Other than the obligate coralivores, I personally (just my opinion) don't think that most of the fish, emeralds or shrimp are looking to eat coral. However, they will not starve. Can you blame them? Here is the typical scenario - fish is fine, fish grows, after a while fish starts to pick on stuff. Or - algae problem, emeralds eat the algae, no more algae, emeralds eat some coral. The likely scenario is that the food has not grown to accommodate the growth, or food has disappeared.
There are tons of successes with all kind of suspect fish working out perfectly fine - anecdotally, the one common denominator seems to be massive amounts of food, as in enough food the fish and inverts are quickly growing.
There are tons of successes with all kind of suspect fish working out perfectly fine - anecdotally, the one common denominator seems to be massive amounts of food, as in enough food the fish and inverts are quickly growing.