what do i have here

[Ssullivan]

this was on my tank last night

help with an id

 

[IamELMO]

Spaghetti worm?

 

[themanthelegond]

Looks like a SPAGHETTI WORM to me.

 

[Ssullivan]

thanks, scary lookin

 

[cbrownfish]

They are beneficial and help clean up the tank.

Spaghetti and Hair Worms… What’s in a Name? by Ronald L. Shimek, Ph.D. - Reefkeeping.com

 

[Bongo Shrimp]

+1 good part of CUC

 

[Boomer]

That is a Cirratulid, "Hairworm", and not a Spaghetti Worms