I believe these are a type of leather coral, like a cross between a finger leather and a sea rod. They do not contain symbiotic algae and so should be kept in moderate to dim light intensity. Nilsen in Reef Secrets says they are difficult to feed and keep for a longer period of time and tend to collapse with little chance of recovery. Food requirements are tiny planktonic fare, such as live brine shrimp nauphi. I have given it phytofeast, arctipods, phytoplex, zooplex, and other preparations but not "live" food, so that may be the problem...
It likes a deep substrate where it can anchor itself. I have it in about a 2 inch sand bed.
I do have flow on the bottom, with 2 power heads on opposite sides of the tank which keeps the gorgonions happy.