Strange worm is it harmful?

[Nick986]

There is this strange worm looking thing in my tank. It's red and has long tentacles. It's not very big. It appears one is living in the rock and one living in the sand. Is it harmful? Should I take them out or leave them in and what are they?

 

[Misled]

Looks like a spaghetti worm. Good guy.

 

[cloak]

My guess would be a harmless Cirratulid worm.

http://www.reefkeeping.com/issues/2002-06/rs/index.php

 

[faithenfire]

spagetti worm. They are a helpful CUC member