I've had my copperband for about 8 months now and it has not touched my clam. It was a little tricky getting him acclimated with the yellow tang, but everything is fine between them now. I spot fed him live blackworms for the first few weeks since he wouldn't touch my homemade frozen food. I avoided the clam on the half shell since I figured it would would entice him towards my clam. I just added more clam to my food mix and he now eats the frozen with no issue. I've even watched him eat flake at times! Like I said before, he is now one of my favorite fish and has lots of personality. At feeding time he comes right to the top of the tank and will take food right from my hand. Also, all of the apatasia in that tank is gone!