Nov 20, 2013 #1 J9demaine Aquarium Advice Apprentice Joined Nov 8, 2013 Messages 16 Purchased some more live rock today. Can anyone say what that is growing on it?
Nov 20, 2013 #2 Mebbid Aquarium Advice Addict Joined Mar 1, 2013 Messages 12,626 Location Michigan USA It looks like a palythoa
Nov 20, 2013 #3 M MacDracor Aquarium Advice Addict Joined May 1, 2011 Messages 1,348 Location Tacoma, WA It does look like a paly, also known as button corals. I'd let it grow a while and watch it.