Help really LONG worm ID

[EeyoreIsMySpiritAnimal]

and that big boy isnt even harmful for a tank cause its just a common bristleworm and not a fireworm, i hope im right that they dont harm anything only eat detrius and leftover foods etc.

Fun fact, the majority of fireworms are also harmless, and the few that aren't are not very common in our tanks, especially if you've never added real (gulf) live rock.