Weird orange worm like thing

[by1123]

There is this weird orange worm like centipede looking thing living in my live rock
Is it safe someone please tell me we want to start up our reef tank soon but I am worried about this pest we just found there seems to maybe be a few. We are cycling our new tank so there is no fish to worry about just live rock.

 

[bang guy]

It's a type of Bristleworm. It looks to me like a beneficial species but I would need a clear closeup to be more accurate.

If it is the species I think it is then the fuzz on the sides of the work are calcium carbonate needles. They can be coated with a small amount of venom which can cause irritation if you touch the animal. It's not dangerous.