As Paul & I once talked about, my 2yr. old copperband had a liking for my crocea clams. But he,s such a lovable friend, I sold all four of my clams and kept him.
He has not bothered anything else yet and my new 75g,is designed with him in mind, corals and all.
He does get a supermarket "live clam" {frozen}, daily and cleans 'em out shiney.