Small Green and White dots on rock

[Schlafrig]

Hello! While cleaning the glass today I noticed these little white and green dots. They do stick up off the rock slightly. I dont see anything moving so im assuming its just some sort of algae but wanted to make sure.

 

[Dan_P]

Hello! While cleaning the glass today I noticed these little white and green dots. They do stick up off the rock slightly. I dont see anything moving so im assuming its just some sort of algae but wanted to make sure.

Maybe a sponge

 

[Tahoe61]

Nerite Snail eggs?

 

[Terry Le]

Definitely eggs