Any ID on these creatures
 

I have about 1000 of these they started just a few on glass and i kept scrapping em off, and then i let em ago because it was getting to be a lot of work and now they are all on glass and on live rock, seem to eat small GHA i had, looks like a snail or something with a spiral tube like shell, but i have no idea, sorry can't get a better pic, they are extremely tiny about the size of the point on a pen, about 1/10th of a dime, any ideas, good or bad, pest or buddy bud b great thank you in advance

Snails. I have them too. They shouldn't be a problem

thanks for the reply, any clue what species?

I'm thinking Rissoids

You didn't notice any eggs on your glass? You can tell what snail they are from the egg laying pattern.