Green threads?

[gear-head]

I assume this is some kind of worm...

They look like green cotton threads, some on rocks as in the attached pic (sorry for the focus) and some coming out of the sand bed.

They move around as if searching for food. Any ideas as to what they are?

Thanks

 

[Fluff]

Medusa worm, or maybe a spaghetti worm.


The bottom of this link has a pic of a medusa worm
http://www.wetwebmedia.com/wormidfaqs4.htm

 

[gear-head]

Medusa I think, either way they appear to be harmless thank goodness!