White plant type things growing on my Saltwater Live Rock?

I have a 55 gallon saltwater tank, and just noticed there are about 5 or 6 little white plants growing on it, they are about a quarter of an inch big, and have a little flair on the top of them...(don't know how else to explain it!)


What could it be... is it bad?

White plant type things growing on my Saltwater Live Rock?
they are little fans and they will grow, but you will have to be sure you treat the tank for raising corals, they will need more calcium than reg tank with fish. all kinds of cool things are on live rock.
Reply:From your description, these sound more like small feather worms (like feather dusters) than a plant. There is also a formaniferan and coral (esp. if this is Atlantic aquacultured rock) that could fit this description.





None of these is a problem to have in the tank. In fact, they filter bits of food out of your water.





If an actual plant (macroalgae), if it's white, it's not alive. It's not unusal to have some die-off on live rock that's been shipped recently. This would eventually decompose.





You might want to look through the photos in the links within this website to see if you can positively identify it using the names of the organisms I've given you as a starting point: http://home2.pacific.net.ph/~sweetyummy4...


http://reefkeeping.com/issues/2006-08/re...


http://www.wetwebmedia.com/marine/index....





Since this sounds like fairly new live rock, this won't be the last of the hitchhikers you'll find. I sometimes find new organisms months after buying rock to start a new tank.
Reply:They are definately NOT bad. They are simply coral. If you want to keep them they will grow aslong as you feed them coral supplements containing high concentrates of calcium. Blue lights also help coral growth.
Reply:overfeeding!
Reply:they might be anenmones(doesnt know how to spell it)