I think I saw marinedepotlive.com was selling them as potentially part of a cleaner crew, you'd get an orange knobby OR a red fromia. But alas, still no latin name for the orange knobby..
http://www.marinedepotlive.com/tccb304.html
Actually, I keep finding several pages with this starfish pictured with pleas of "If anyone knows the latin name of this starfish please let us know .... "
Would this be worthwhile posing the ID question to say, Dr. Ron?