Are these baby snails?

[cdemoss01]

What in the world are these tiny dots?
They look like baby astrea snails with the shell structure.
Photo below

 

[cdemoss01]

 

[glmory]

Hard to tell but I would guess tube worms.

 

[cdemoss01]

Hard to tell but I would guess tube worms.

On glass?

 

[SnappyShrimp]

If they don't move, they seem like they're likely spirorbid worms. They're harmless filter feeders that can attach and grow on glass, you can just scrape them off with an algae scraper. They do seem to proliferate quickly in my tank at least.

 

[Baldyreef]

If they don't move, they seem like they're likely spirorbid worms. They're harmless filter feeders that can attach and grow on glass, you can just scrape them off with an algae scraper. They do seem to proliferate quickly in my tank at least.

same, there's gotta be hundreds if I counted in my sump