Help me identify this ?worm? ?polyp?

[iaJim]

<a href="http://s35.photobucket.com/albums/d179/iaJim/?action=view&current=PICT0139.jpg" target="_blank"><img src="http://i35.photobucket.com/albums/d179/iaJim/PICT0139.jpg" border="0" alt="Unknown reef creature"></a>

Sorry for the quality of the picture, but my point and shoot will only do so much.

I am calling this a worm, but it is sessile. It may be some sort of polyp. It has very small "hairs" at the head. It is about an inch long during the day and somewhat smaller at night. It is out all of the time, it never retracts. It's about an eighth of an inch across, maybe a little less. There was just one there last I noticed, but now you can see that there are seven or more. This is in a coral colony near the top of the tank. I have two 400 watt MH's, and they seem to thrive in that light. I have noticed that another one is growing on the other side of the tank.

Any ideas of what this may be?

Thanks!

 

[Elysia]

The green stuff? Perhaps it is Neomeris sp. algae.

http://saltcorner.com/sections/guest/algaepage/Green/calcareousalgae/Neomeris.htm

 

[iaJim]

OK, if it's green it's green. I'm color blind, so my color naming is always up for discussion. Yes! I think that's exactly what it is. I'm glad to see that it's reef safe. Thanks for giving me a name for it!