Worm like creature on rock

[patrick886]

Hope anyone can help me ID this. Last night I spotted a long white worm slowly crawling on the live rock. Even though it looks like a white string, it does move very slowly. Any guidance will be appreciated.

 

[Zoa_Fanatic]

Whatever it is that wrasse should murder it if it sees it

 

[patrick886]

Bump

 

[vetteguy53081]

Looks like spinoid worm. Pics are very blue