I have a Valentini that I've had since he was just a tiny lil thing... 7mos later.... I am going to have to fish him out as he will not let me keep a cuc in the tank any longer. I Love this fish as he is beautiful and so entertaining to watch as he cruises the currents of the tank and interacts with everyone with no issue. He goes where others know to stay away from.. He will not let my crabs and snails live! He eats everything I feed the others (Mysis, frozen Clams, Fish Frenzy...whatever...., eats Nori off the clip so I cannot believe he is actually hungry...it's just his thing! Really don't want to banish him to the sump so I will probably exchange for a credit at my LFS....As for the beak...seems to take care of itself by picking at the rockwork.....