ID help please    7/16/12
Can anyone help me identify the purple item in this picture?  It has been growing on my live rock like a vine, or at least that is the best I can think to describe it.  I have tried looking at some of my favorite websites under plants and corals with no luck.  I don't know what, if anything, I need to do for its care.
Thank you for all your help and all you do.  Your website has the best information out there. 
Thanks Again,
Jenni
<Looks to be a species of Glass Anemone. Please read here:
http://www.wetwebmedia.com/marine/inverts/cnidaria/anthozoa/aiptasia/aiptasia.htm
and the linked files above. Bob Fenner>

White translucent tube like growths 7/4/2012
Hi crew,
<Hi RA, Mich here.>
Great job you do for the community, thanks.
<On behalf of Bob and the volunteers here, you're welcome!>
I have multiple translucent tube like growths appearing all over my tank.
<Mostly in dark places I presume...>
See pictures.
<Yes.>
They are sticky and soft. Water quality is good, 30% water change twice a week with the addition of supplements and LED lights (that may actually be too strong!) They come off with a good brushing. What do you think they are.
<Looks like sponge growth to me.  If it were my aquarium I would let them grow as opposed to brushing them off.  They are beneficial filter feeders.
Mich>
RA

Two ID's requested, please   6/28/12
Hi wonderful experts!
<Tim>
 I am always running into unexpected critters in my tanks.
<Wonderful freebies, well most of the time...>
 Usually "Reef Invertebrates" helps me to identify them, but these two have me stumped.
<I'll see what I can do.>
The first is a worm-like thing living in the midst of a small colony of star polyps. I apologize for the poor picture, but I tried like crazy, and this is the best I can do.  I'll try to describe it.  You can tell the size from context.  It is curled in a small spiral, an obviously soft worm encased in a hard tube (except for its head).  The color, not done justice in this photo, is a brilliant orange, almost Day-Glo.  It has two prominent, long, thin antennae.  It also has a short tube-like orifice that convulses rhythmically.  I am almost certain that it is pumping water in (or out) through the visible orifice on its head, and pumping it out (or in) via some other orifice whose location I cannot see.  Enough of the head extends from the end of the tube to allow it to continually 'look around' itself, almost as if it's searching for something, although I cannot see anything that looks like eyes.
<Likely a worm from Family Serpulidae. Not a cause for concern, unless you are a copepod or bacteria.>
I found the other when I removed a pump for cleaning.  I laid them on a 3x5 card so that you can see their size via the ruled lines on the card.  I have not seen them anywhere else in the tank, but there were many of them on and near the pump.  They are very soft-bodied, with no features such as antennae, eyes or mouth that I could see.
<These are Syconoid sponges, commonly called Pineapple or Q-tip sponges.
They are harmless filter feeders that live in low light/high flow areas.
Check the inside of your skimmer and under rocks- you will find more.>
Any thoughts on IDing these things would be appreciated.  Thanks!
<Anytime>
Tim
<Jordan>

Possible red Macro Algae please ID.   6/21/12
So about two months ago I bought a new T5 lighting system  for my 46 Gallon bow front reef aquarium. After about four weeks with the new light I noticed red "spots" forming on all of the live rock. At that time I took a picture and went to a forum to see if anyone could ID it, most people thought it was a form of sponge,
<Mmm, maybe>
 so I just left it alone and let it grow.
Now four weeks later it has grown bigger, and I have noticed that it doesn't have any vents like most sponges do and it seems to be growing in colonies. Which makes me think it's probably not a sponge. Also it is growing on moving objects. The other day I say a few pieces of it on one of my hermit crabs and snails, and from what I have heard sponges don't grow on things that move.
<Some do>
 So my main question is "What is it? and is it
harmful?" it has been fine since I had it, kind of pretty too. But if it's aggressive and will choke out my coral I would like to remove it, or at least as much of it as possible. Thank you for your time and help.
<Need a better resolved ("close up", in focus) pic... this could be a type of Rhodophyte... even a reddish Brown/Phaeophyte, like a Ralfsia sp.... or could be another class, group entirely. I'd leave as is for now. Bob Fenner>

Re: Possible red Macro Algae please ID. – 6/21/12
Thank you for you reply it left me with some comfort. I would add more detailed pictures but I'm limited by what my phone can do and my real camera takes worse pictures. When I do get a better camera I'll take some shot and send it your way to get a real ID, just so I and possibly other people know what they have.
<I thank you. BobF>