Can someone please identify these for me

[liv2 HuntnFish]

One looks like a small white worm the other a small white dot. are these something I need to be worried about? Do I need to remove the rock as for the dot its starting to show up more and more on rocks and the glass but I cant tell what it is.

Cant find any info on either.

 

[SAPPER]

I cant make much detail out with your photos but pretty sure they will be Spirorbid Worms

 

[KJ]

One looks like a small white worm

Feather duster filter feeder.

other a small white dot

Spirorbis worm filter feeder.