Spaghetti Worm? Hair Worm?

[DubReef]

Can you guys please help ID this guy, and confirm how it may have hitchhiked into my QT? Thanks in advance.

 

[LegalReefer]

Spaghetti worm, harmless and beneficial detritivore. What all has gone into your quarantine tank? It likely came in on something, possibly when very small

 

[Tired]

Something in the department of "worms that have a lot of tendrils to grab detritus with". Probably spaghetti worm. May very mildly annoy corals if it sets up shop next to them, but generally novelty-to-beneficial. Agreed that it likely hitchhiked in on something while small, or inside a hole.