Similar look to purple hornets...but not quite.

I picked up a nice frag of these for $15 ( http://img22.imageshack.us/img22/2699/japzoa01.jpg ) but unfortunately, they all melted away about a week later. I think they were gathered in the wild and had not properly acclimated to the aquarium environment.

Your colony looks great!

I paid 75 bucks for this colony....about 40 polyps. So far they seem to be doing well. (fingers crossed)

I have some of those too! When I first got them they started to melt. Until I read someones post about those Zoos not liking to much light. I placed it in a really low light area and the zoos started to thrive again.

deep waters like low light

yeah those are deep water japs, very low lighters, nice colonie