Treasures from the Sea of Galilee

Year after year of very small quantities of rain, made our only lake in Israel, the Sea of Galilee, recede its level, leaving a larger shore.  On our weekend vacation to Tiberias, a town by the lake, I collected a box full of shells just lying there waiting to picked up.  In my ignorance I never knew lakes too had shells.  I thought these were salt sea water creatures.  I think these are small enough to be used in miniature scenes.  In fact, I am going to add a few in each swap I'll make in the future. They are quite beautiful.