I'm on my 2nd copperband currently. The first one I really should have known better than to get. It was thin, and as soon as it was placed in the tank, it just hung out in the corner until it died about 36 hours later. The 2nd one was fat and happy looking at the
LFS and I made sure he ate before he came home. He'sbeen in the tank since Wednesday, eats mysis and spirulina enriched brine, picks at the rocks and swims about the tank. He has not nipped at any corals or clams yet, but I guess we'll see. It realy is a gorgeous fish, and I'm thrilled he seems to be doing OK.
I have no personal experience with the longnose.