Clithon retropictum

Clithon retropictum (기수갈고둥, 石蜑螺) is a species of freshwater and brackish water snail with an operculum, a nerite. It is an aquatic gastropod mollusk in the family Neritidae, the nerites.

Distribution
This species occurs in Japan: Honshu, Kyushu and Shikoku. Its habitat is also located in South Korea near Jeju and Taiwan.

Habitat
This nerite lives in brackish water as well as freshwater.

Feeding habits
Clithon retropictum is herbivorous species.

Life cycle
Clithon retropictum is oviparous. Juveniles hatch from eggs in September. The lifespan of Clithon retropictum is up to 12 years and it belongs among the most long-lived of freshwater gastropods.

Parasites

 * Vibrio parahaemolyticus

Status
The species is considered as a second grade endangered species by the Korean ministry of environment.