Weird thingy

[TRIX]

Okay First off I will appoligies for not having pic. I have this thing on one of my rocks. It has build a bone like structure around it's self. White in coulor. It appears to have antenas that it expands and retracts. What it seems to do is let out a string of mucus or something and then pull it back in. Does anyone want to take a guess. Also where is a good place to look for a pic to compare. Thanks

[KrazyKuch]

Sounds Like a VERMITID SNAIL (http://www.xtalworld.com/Aquarium/hitchfaq.htm) They are good to have IMHO!!


(http://www.xtalworld.com/Aquarium/hitchfaq.htm)

[andsoitgoes]

I second that, or it could be a spionid worm:

http://www.xtalworld.com/Aquarium/spionid.jpg