What is this worm thing

[Samwow]

I noticed this the other day and thought it was just a piece of food or algae but it's definitely been moving very slowly up the rock Doesn't make lots of movement and it's stayed in the same general area.

 

[Retro Reefer]

Hard to tell from pic but looks like maybe a spaghetti worm

 

[Lovemyreef2015]

Agree, ^^ spaghetti worm