Is this a pest on my new zoas?

[Billango]

Got some new zoas, dipped them, placed them in tank, noticed these tendrils reaching around a bit. Dipped them again and they still were there. What are these, should I worry about it, how would I get rid of them?

 

[Slocke]

Looks like a spaghetti worm. Good detritus eater but can annoy coral somewhat if its too close. A wrasse will eat it pretty fast probably.