I know this is an older thread, but i thought i'd give you my 2 cents. The photo i saw looked like a toadstool if i'm correct. Not to big into leather's, or colt corals, not because their ugly or plain, but mainly on their issue of toxin release. They can be very aggressive in that aspect. I have leathers and colts in my corals for sale tanks, but not a single one in my display just for that reason. People might disagree with me, but hell leather, colt, and suprisingly even g.s.p. are some of the worst allepathy producing corals you can get. so my suggestion would be run a very high quality carbon if your gonna have these types of corals. Just my 2 cents. Hope this helps you down the road.