Naso is a genus of fish in the surgeonfish family, acanthuridae. fish of this genus are known commonly as unicornfishes because of the "rostral protuberance", a hornlike extension of the forehead present in some species. unicorn fish are popular with spearfishermen and may be cooked by grilling them whole. unicornfish primarily live around coral reefs and eat mostly algae as well as roshi (flour) in maldives. it is very popular in maldives. this genus is distributed across the indo-pacific from africa to hawaii.

Source: Wikipedia