Another worm question

[Trexorcist]

Hey everyone. Looking for some ID help. Spotted this guy while doing some maintenance on my sump. I’ll include some mildly confusing perspective in reference to the photo. You’re looking up at the bottom of my main display tank.

Edit: Stretched out it would be approximately 5-6” long.

 

[Reef Jay]

Not to sure exactly what it is but I sure wouldn’t want it in my tank just giving my opinion , might wanna wait for someone with some experience tho

 

[Lovemyreef2015]

Could be a type of phyllodocidae worm. Need more close up pictures of the head area first to be 100%. If it is then they pray on other worms.

 

[KJ]

Catch him and put him in a container feel with water for easier ID.