These are the damsels I'm taking about, just so we're talking about the same thing:
http://www.peteducation.com/images/a...low_damsel.jpg
or
http://www.underwater.com.au/content...amsel_fiji.jpg
One of mine, who I asume is either male or female has vertical brown-black bars on its dorsal fin. I'm sorry I can't find any good photos of it.