What is this in my tank!? Please help!

[nature786]

That's a bristle for sure.
I got some big ones in my Nem Tank and took allot of pics & watched them for an hour.
As long as there is detritus; they're harmless.

 

[1983evansd]

He's a lot more carefully about going in the trap now.... I know what live rock he lives in so may have to dunk it in r.o water....

 

[1983evansd]

I've took the live rock out he was in and put it in rodi water for 15 min do you think he's dead? Can I put the live rock back in the tank or will it cause a spike? Thanks in advance

 

[joshbbert]

If its just a bristle worm hes really not gonna do much harm hell keep your rockwork clean and help with detritus