Red stringy filaments on rock and sand bed

[Steve089]

as I was working in my tank today, noticed these red strings in the sand bed and on the rock. can someone please help ID?

 

[Reefer5640]

Looks like a spaghetti work

 

[Conchman]

Spaghetti worm...most likely. I had more earlier in my tanks life. just saw one recently. They say they are ok...I have not seen anything bad...

 

[Steve089]

thank you both!! glad it wasn’t a bad pest

 

[Reefer5640]

Worm I meant, not work. And they are beneficial detritivores. I’ve seen them irritate corals before though. If you don’t want them there are fish that will eat them