Yes it is definitely a bristle worm! One had bitten/stung him on the thumb before but that one was only 1 or 2", I can only imagine what damage this fella could have done.

He's pretty proud of his fishies. He used to have angelfish and took them to a 3rd place finish in the Dutch nationals. After that he changed to a reef aquarium and took 2nd only a couple of years later. Now he's sick of the judging and just does it for fun.