I have one and although they told me it may pick at corals I have never seen it do so. Although I have seen a declining amount of hermits in the tank, which is not bad, I have too many. I also have a mated pair of yellow coral banded shrimps and the hawk scared me at first when I got him, it perched right next to them, but he left them alone. Ive had him for 4 months and the only inverts ive seen him eat is the hermits. He wont eat pellets and he loves brine.