sand, worm hole

i have an apistia growing on one of my rocks so i shocked it in some cold fresh water for about a half hour. and i put the rock face down to cover it.
thats when i found this clear worm sticking out, grabing a piece of sand, pulling it in and forming a hole that sticks out of the rock.
i watched it for about an hour and it only grabed three grains of sand but it places it neatly where it wants it.
any ideas would be great.
i swear these tanks get better every day.

 

Could be a spaghetti worm?? http://www.deepseaimages.com/dsilibrary/showgallery.php?cat=986&password=
Link borrowed from Matt
Jim

 

thats what she is. thankx bud.

 

is that one worm that has multiple "arms, tentacles" or whatever you would like to call them
or is it multiple worms. cause i saw something similar that was comming out of my LR at night but it only had one tentacle... just a worm... get me?

Marc.

 

mine only has one that comes out the most , but i have seen two.

 

I have seen 1, sometimes 2 stringers but never anymore than 3 from my rocks.
Jim