The Princess Parrotfish is an attractive fish but in a reef tank there are some exceptions. The maximum length of this fish can get to around 13", so it is going to take a fairly large tank (135 gal). It likes fresh chopped or frozen seafoods, flake food, frozen foods for herbivores, etc. This fish should not be kept with stony corals, as it has a tendency to "rasp" on them. (nibbling algae etc off of them) It needs micro algae to help survive. beautiful fish, just not great with a reef system. (information gathered from "Marine Fishes" by Scott W. Michael