What is this? Long yellow tentacles?

[Haypoo]

I have a couple of these long yellow string looking things around my tank. What is it? They're right underneath the orange zoas

 

[fanaglethebagle]

Spaghetti worms, they are good guys who eat poop but some people dislike them because they can disturb coral

 

[Haypoo]

thank you so much!

 

[Jocko]

Yellow ones? That's cool. I've only ever had white ones.