I think thats what mine is then, it was sold as a "Unicorn Naso" I know its not the kind with the horn but I thought maybe that was just a common name for it. I have always been a little bit confused on what kind of fish it is to be honest
if you go to wwm it is called a Vlaming's Unicorn tang. it is part of the genus nazo. there is no unicorn tang there are Bignose Unicornfish, Sleek Unicornfish, Shortnose Unicorn, and more.
Sorry Wrongo, there is a fish genus
Naso Unicornis, know as the unicorn tang, also know as the bluespine unicornfish, get horns
Naso Vlamingii , known as a Vlamingi tang or vlamings unicorn fish
these do not get horns, this is what I have,