I caught my tang in our local waters.
It was probably less than 2 inches at the time.
In fact at first I didn't recognise it as a tennenti, it was so black (thought it was a nigrofuscus, when I first spotted it).
Could not even see the "leutenant " markings at first
Here is a pic of it after it has been in my tank for a few weeks.
Currently, its a lot lighter than this.