First hitchhiker - Bristle worm?

[TheBear78]

Morning all.
I saw my first hitch hiker today (not counting Aiptasia!!)
I'm fairly certain that it is a "safe" bristle worm and not its fiery cousin but as ever, expert opinion would be well received.
Currently separated from the tank and in a glass. I'll pop him back in if it's the former.
What do you think?
Many thanks.

 

[Debramb]

IMO, chuck it, if you have one, you’ll find more. Good clean up! I leave ours it main tank, net them from sump where they seem to breed! A good sign of eco balance for overfeeding,

 

[kjkszpj9]

looks like a bristle worm that was recently cut in half or something cause it looks pretty odd.