Detwah Lagoon (Arabic: ديطواح لاجون, also transliterated Ditwah Lagoon) is a saline lagoon situated on the north‑west coast of Socotra, an island that forms part of Yemen. The lagoon lies near the coastal settlement of Qalansiyah and is separated from the Gulf of Aden by a narrow sand spit, through which it maintains a limited connection to the open sea.
Geography
- Coordinates: 12°42′20″ N, 53°30′24″ E (approximately 12.7056° N, 53.5067° E).
- The lagoon is part of the larger Gulf of Aden basin and receives inflow from the surrounding coastal plain. Its shallow, saline waters are characteristic of a coastal lagoon environment.
Ecology
Detwah Lagoon supports extensive seagrass meadows that provide important nursery habitats for juvenile fish species. The shoreline hosts several endemic plant species, including Croton socotranus and Jatropha unicostata. The lagoon’s marine fauna includes vulnerable ray species such as the reticulate whipray (Himantura uarnak) and the bluespotted ribbontail ray (Taeniura lymma).
The area is a significant roosting and feeding ground for waterbirds, serving as a breeding site for the Egyptian vulture (Neophron percnopterus) and the Socotra cormorant (Phalacrocorax nigrogularis).
Conservation Status
- Ramsar Designation: Detwah Lagoon was designated as a Ramsar wetland of international importance on 10 August 2007 (Ramsar reference no. 1736), making it Yemen’s first Ramsar site.
- UNESCO Recognition: The entire Socotra archipelago, including Detwah Lagoon, was declared a UNESCO biosphere reserve in 2003 and later inscribed as a UNESCO World Heritage Site in 2008, acknowledging its high levels of biodiversity and endemism.
Conservation efforts focus on protecting the lagoon’s unique marine and coastal ecosystems, mitigating the impacts of unplanned development, and preserving its role as a habitat for both endemic and migratory species.