Ocean Science Journal

, Volume 48, Issue 3, pp 259–262 | Cite as

The occurrence of Clithon retropictus (v. Martens, 1879) (Gastropoda: Neritidae) in an unusual habitat, northern Jeju Island, Republic of Korea

  • Ronald G. Noseworthy
  • Hee-Jung Lee
  • Kwang-Sik Choi


Clithon retropictus is a neritid gastropod inhabiting mainly brackish water. Currently this species has been listed as a second grade endangered species of wildlife in Korea by the Ministry of Environment, due to the decrease in its population size. C. retropictus has previously been identified from estuaries on the south coast of Korea. In Jeju Island, this species has been reported only from the south coast. However, a population has recently been discovered on the north coast of the island in an apparently new type of habitat, under rocks adjacent to a dry riverbed on a muddy substrate. C. retropictus was found to be aggregated under some of the larger rocks, and the habitat was located near the high tide line. The present study reports some possible reasons for the occurrence of the population in this unusual habitat, and provides useful information on the biometry and population size which can be used in the management of this endangered species.

Key words

Clithon retropictus Neritidae habitat endangered species estuary Jeju Island 


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Copyright information

© Korea Ocean Research & Development Institute (KORDI) and the Korean Society of Oceanography (KSO) and Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Ronald G. Noseworthy
    • 1
  • Hee-Jung Lee
    • 1
  • Kwang-Sik Choi
    • 1
  1. 1.School of Marine Biomedical ScienceJeju National UniversityJejuKorea

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