There are a few healthy elegance corals around. Unfortunately, very few. At this time, several experts recommend not trying to keep a wild caught Catalaphyllia.
http://www.tidalgardens.com/pages/coral/catalaphyllia.html
In conversations I have had with Eric Borneman, he indicated he does not consider a Catalaphyllia 'healthy' until it has been thriving in captivity for at least a year.
I have had conversations with LFS owners who consider it a 'success' if a Catalaphyllia lives for 9 to 12 months.
This is a controversial topic that reefkeepers are passionate about, BUT Catalaphyllia is one of the organisms where statistics actually show that the dismal survival rate in captivity has led to overcollection & a decrease in the population of the animal in the wild. There are consequences - please refer to the legislation thread on this forum posted by Mr. MikeB.
If you insist on purchasing a Catalaphyllia now, before we understand the mystery factor (disease?) which has changed this from a beginner's coral to one that has a very, very low survival rate: 1) recognize that your purchase is fueling a demand which leads to over-collection, and 2) try to keep it in an appropriate environment. Catalaphyllia prefers different conditions than SPS.
http://www.wetwebmedia.com/elegance.htm
If you have a healthy Catalaphyllia that you have had for over a year, consider fragging it for distribution to other reefers, or contribution to the Elegance Coral project.
http://www.reefcentral.com/forums/showthread.php?s=&threadid=319263
A healthy Catalaphyllia is a beautiful coral. If we can successfully fill the demand of our hobby through captive propagation of this coral, we will have taken a great step toward responsible reef-keeping.