 , almost 150 freshwater snails are known from Lake Baikal, including 117 endemic species from the subfamilies Baicaliinae (part of the Amnicolidae) and Benedictiinae (part of the Lithoglyphidae), and the families Planorbidae and Valvatidae.All endemics have been recorded between , but the majority mainly live at shallower depths.About 30 freshwater snail species can be seen deeper than , which represents the approximate limit of the sunlight zone, but only 10 are truly deepwater species.