One other difference about the pictures on
http://www.jciaquariums.com/livestoc...ne/page_02.htm
The first 2 pictures show a siganus unimaculatus, or one-spot foxface.
The 3rd picture is actually not the same type of foxface, it is a siganus vulpinus. The correct stressed picture should look a bit more like this: (notice the presence of the spot)
Just an observation, as both types exhibit the same behavior. I came quite close to bringing one of these home today, but wound up with something else...another post to come.