Strange occurance on live rock

So I purchased a very mature piece or coraline encrusted live rock to seed our base rock. and now, on a couple of occasions I have watched something strange. What looks like two pieces of thin fishing line, about 3 inches long come out of the same whole carrying a little white package...the appendages extend, drop the packagee and retract, not to be seen again until it drops another package??! Is my mind playing trix on me!? Or is my lunesta kicking in..

 

Look up Spaghetti worm, Vermetid Snails, those are the 2 things I can think of off the top of my head.

It's a worm what type not sure.

 

Hmm...I have had many a run in with Speghetti worms...and I feel this is semthing different. I googled those snails...and I don't think so. It looks like it is using two cat whiskers like chopsticks to take stuff out of the hole, drop it and retrack back in the hole!

 

Worm Hitch Hikers

Look at the Echiura.

 

Nope, still not it.. I am going to try and video it when I have time to sit with my camera poised and ready....

 

It is a spionid or spirorbid worm. Safe to have and actually part of your CUC.

 

Spionid. Spirobids are the little feather dusters. The package is probably poop LOL.

 

Dono