Need help identifying snail

[cmumma]

I'm new to this, but I find the snails equally as interesting as the shrimp. The other day 7 out of the 10 snails in a 1/2 gallon jar were on the same rock within and inch of each other. They must have been having a party... or a very slow flashmob.

[Stalker]

Please try to make better pictures, maybe outside of the water. Pictures of the operculum and shell opening will be helpfull.