Tiny Red Bugs/Worms on Sand Bed

[litsoh]

Just wanted to see if anyone knew what these tiny organisms are on my sand bed. They’re on the center of the photo and move kind of like worms. Copepods on the left side for scale. Pretty sure they’re some sort of detrivore but I was just curious.

 

[tzabor10]

Could be flatworms. Hard to tell from the picture

 

[litsoh]

Could be flatworms. Hard to tell from the picture

Yeah I wish my phone’s zoom could really get in there but that’s the best I could get in focus.