The risk is to keep the copperband alive, which many have problems with. If one decides to keep a copperband, then one should be prepared to feed it properly and as both I did and the copperbands other owner, move the clams out if necessary.
I agree with Levi, that the clams being completely different, should not turn them on to ornamentals, which is also the general agreement of others in the mentioned thread.
All grazing fish are a risk to many of the corals we keep. Like his mentioned tang, my sailfin once ate a small piece of a large finger leather I was cutting, thinking it was his food. Decided that was pretty good. Although he never really bothered the leather, anytime I was fragging he was in my hands chowing down the pieces that floated loose.
