ID on this large LFS worm?

[Agathos]

Hi,

This rather large worm was removed from one of my LFS' tanks. It's lying on the bottom of a 10 liter bucket. I'd estimate the length to at least 10 inches. It stung the LFS guy in the finger, he had to remove lots of spikes. It does look like a fireworm, right?

 

[fishguy84]

Bristle Worm

http://scienceblogs.com/zooillogix/2009/03/barry_the_coral_ripper.php

 

[Salamander]

Common names are...common and mean little. But that looks more like what's commonly referred to as a fire worm which could be harmful to corals where what are generally called bristleworms are harmless.