What is this?

[EvilLucky6]

not sure what this is.
Pulled out of sand while Siphoning.
Don't remember ever seeing this before. Picture below.

 

[Mastiffsrule]

Hi,

Pics kind hard for me to see. Do the look sort of reddish and any type of white bristles along the sides? Possibly small bristle worms.

 

[jeffchapok]

Hard to tell from those pics, but they look like spaghetti worms to me.