LOL...Thats funny. But thats really what it reminds me of. I cant take pics because I'm working now, but when we went to the fish store yest, we saw a small spot of the same type stuff in their display tank. I asked a staff member about it and they told us it was dead coraline. Our rock was dead when we placed it in our tank and its only been running for a month or two so we havent had any coraline grow, only brown algea. So who knows, but the fish and inverts are still happy/heathly and the water parameters are still good so I guess it is ok.