Cerianthus - The proper scientific name is Australoheros oblongum. They were only found in the wild in the 1800's, and have not been discovered since. I have no idea if the were facetum at one point, but they do share some similarities, you're right. However, they don't get as big, and are not very aggressive fish at all.
These pictures are kind of crappy. They really don't show the color very well. They are so much brighter than these pictures make them.
Sadly the dogfish wasn't a freebie from toddnbecka. I got her in June.