Unknown worms, red stringy masses

[Logzor]

I'm trying to identify a creature that comes out during the night in my reef. They hide under corals and rocks during the day.

They appear to be red stringy masses, they stretch out over the rocks and corals at night to feed, I assume. One was stretched out fully over the bottom, it appears to have a thin white tubular body with a head that consists of tons of tiny red strings. There is no sign of any organs/eyes/mouths/legs/etc.

What are these things?

 

[tetra-tag]

Could be either a Cirratulid or a Terebellid worm. Both are considered beneficial detritivores.

http://ronshimek.com/blog/?tag=cirratulids

 

[Logzor]

Definitely a Cirratulids aka hair worm. Thanks for the help IDing these.

 

[theROYSKIE]

to the layman ie. me lol they r called spaghetti worms. wonderful and interesting addition to the diverse home Reef. congrats on the find, they r great janitors.