Bristle or Bobbit Worm?

[Tellie-Vision]

Found this thing on a chunk I got recently. I don’t trust my judgement, can anyone tell for sure what this is? I know the picture’s not great, but I don’t want to risk messing with it for a better one :downcast-face-with-sweat:

 

[GoReefin]

Hard to tell but looks like a Bobbit worm. Get some pics at night with red light if you can.

 

[Tellie-Vision]

Hard to tell but looks like a Bobbit worm. Get some pics at night with red light if you can.

Ah dang, I was kinda afraid of that. It kinda pops out of the rock and goes back down like one too, guess I’ll have to figure out a way to trap it

 

[Hairyteeth]

Is there a hard encrusted bit there?