Here's a pic of a funky bit of algae from Melev's ID site...
http://www.melevsreef.com/id/annulata.html
Apparently somewhat rare (I had a few isolated pieces in my first tank that didn't last long). I have as many if not more than shown in the picture. Only growing on the 3 massive pieces I picked up from Big Als. Can't say I really dig'em plus they use calcium!