Assiminea

Assiminea is a genus of minute, salt-tolerant snails with an operculum, aquatic gastropod mollusks, or micromollusks, in the family Assimineidae.

==Distribution and habitat== These snails can be found worldwide. They live usually in brackish water between tide-marks on the mud of estuaries and salt marshes of tropical and temperate regions, at beaches, in water and at land. But species are to be found both in perfectly salt and in perfectly fresh water.