Acknowledgements
This research was conducted as a part of “National Survey of Tidal Flats in KOREA” of the Ministry of Land, Transport, and Maritime Affairs. This work was also supported by the National Research Foundation of Korea Grant (NRF-2009-361-A00007). We are grateful to local people, especially four persons; Mrs. Inmo Choi, Choonil Choi, Sunggu Jung and Jongsun Kim who live in Daebu Island for talking about their marine and coastal culture and collecting fishing gears.