Centipede?

[FullReefSurvivalMode]

Heeelp!
Good a bad guy?
Please help me identify this weirdo… Almost looks like a centipede.
Hope you can help!
Best Rasmus

 

[Solga]

Bristle worm, don't touch it with bare hands !
Can be good or bad, depending on the person. I let them be as long as they don't get too big. It's one of those things that you will end up with eventually, no matter what.