What is this wormy thing?

[Reefster]

Just noticed this thing at the base of my coral. Not sure how long it has been there, but it is only visible when lights are off - it is not covered by the coral.

 

[kilo]

Another head splitting ?

 

[AmberSunrise]

Looks like a peanut worm, they are ok no need to worry.

 

[Bifferwine]

I agree with Amber, it does look like a peanut worm. They are reef safe. Very common hitch hikers.