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Coastal Area 21001 Oki-Daitojima Island

Basic Information A separate window opensReferences

Relevant municipalities Kitadaito, Okinawa Prefecture
Area (km2) 102

Reason(s) for selection A separate window opensCriteria

Selected by experts as a place where rare species live.

Characteristics A separate window opensReferences

These are the waters in the vicinity of Oki-Daitojima Island (one of the Daitojima Islands), located in the Pacific Ocean about 408 km southeast of the city of Naha and about 150 km south of Minami-Daitojima Island. It is an uninhabited raised atoll island formed by a raised coral reef, with a clamshell shape. While its terrain strongly resembles that of Kita-Daitojima and Minami-Daitojima islands, it lacks the rolling basins seen in the centers of those islands, and its coast is surrounded by reefs. In these waters there are high concentrations of rayed wheel limpet, a species distributed in few locations in Japan, and Tectarius (Echininus) spinulosus, a species that might not be recorded elsewhere, can be seen here too (Kurozumi, personal communication).

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2)
Moba (seaweed bed) (km2)
Coral reef coverage (km2)
Natural coast (km) 4.6
Rate of natural coast (%) 100
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source


* This is the species list of which meet the criteria. In that matter, this list does not include all species that inhabit the individual area.
Abbreviation in the information is as follows.
[Br/Ne] : Adjacent water of breeding area or nesting site
[Sp] : spawning area
[Ad] : species not used for analysis but add to the list because inhabit information was collected later
[Ex] : species used for analysis but considered to be possibly extinct in the EBSA region (area)
No mark : data of species distribution


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