They form a case that looks like a small snail.

This is a small snail with a white and brown striped shell.

These small and minute snails live on land, very close to seawater.

This small snail is less than 3 mm in maximum dimension.

This small snail has a maximum dimension of less than 3 mm.

These are very small or minute snails, with a shell height of less than 8 mm.

Some of these, such as most small snails and limpets, are quite harmless.

These small snails have no mouth or gut, and absorb nutrients through their body wall.

This small snail lives on water plants in freshwater.

These small snails live in the tidal zone of rocky shores.