What is this worm?

[Greatdane]

Had the tank for two years haven put anything in it recently just saw them today there’s two right in the same spot

 

[blaxsun]

It looks like a bristleworm, but if it's red (not pink) it's a fireworm (couldn't tell 100% from the image).

 

[vetteguy53081]

Common bristleworm which eats uneaten food and detritus
Although not welcomed in my tank they are fconsidered clean up crew