Help me identify something on a snail

[aqua1dude]

This is another help me identify something thread. My tank is only a few weeks old so I still find my self just looking at whatever I can in the tank. Today I noticed a small thing that seemed to pop in and out of the shell of a snail. It would come out and spread like a fan for a few seconds then slide back into the shell. I watched it do this several times. Here is a photo of it. Its on the top right of the snail's shell. What is it.

http://i604.photobucket.com/albums/tt124/nupe009/1-2.jpg (http://s604.photobucket.com/user/nupe009/media/1-2.jpg.html)

[aqua1dude]

I think I figured out what it is. It's a fan worm based on what I've read online.

[whiteshark]

Harmless feather duster. I really like these guys. Something we kinda take for granted in a reef tank that are actually really cool.

[aqua1dude]

Harmless feather duster. I really like these guys. Something we kinda take for granted in a reef tank that are actually really cool.


Thanks. I'm fascinated with all the things I've been seeing in my tank. I spent several minutes just watching that thing pop in and out of the shell. I thought I was seeing things at first.