See caferacermike I wanted to say that because I bought a piece of live rock that had the same looking thing on it. I cant really see that clearly what it is but if I had to guess I would go with what you said.
i looked up clathrina sp, and it does look like the pics for it. there is also a growth by it that is a bit like clathrina coriacea, unfortunalty the page i found with good pics was in russian i think so i couldnt read the info but i'll keep looking. thanks for the help!
forum community dedicated to tropical fish owners and enthusiasts. Come join the discussion about species,breeding, health, behavior, aquariums, adopting, care, classifieds, and more! Open to fish, plants and reptiles living in freshwater or saltwater environments.