What are these tiny worms?

[Lelegance]

These tiny red worms were in my sandbed at night feeding time, and they squirm around a bit. They look like moving fishing line or something. What are they?

 

[Slocke]

Spaghetti worm
Good cuc

 

[vetteguy53081]

These tiny red worms were in my sandbed at night feeding time, and they squirm around a bit. They look like moving fishing line or something. What are they?

Looks very widespread to be spaghetti worm. If moving, maybe but im thinking filaments from developing cyanobacteria

 

[GSPClown94]

Can’t see the video but the picture looks like bubble algae