Live rock oddity

[Armyrec1]

Hey guys. Can anyone tell me what this is and if it’s ok to keep on here? It’s on a piece of live rock I just added.
It doesn’t appear to be moving or anything.

Thanks in advance.

 

[keagan]

You'll need a clearer picture to get a reliable I.D. It looks like an out of focus juvenile snowflake eel, or a serpent star limb. But that's based on the colour pattern I see and what shape I can make out, both move so I'm pretty sure neither of those are a correct I.D.

 

[Armyrec1]

The more I look at it, the more it looks like it’s embedded into the rock.

 

[hatfielj]

If it's moving, it's probably a starfish limb. Otherwise, probably just some sort of tube worm

 

[Decamicron Labs Verified Sponsor]

I am almost certain this is a brittle starfish limb.