Rocher Siyyan is a striking isolated white

islet An islet ( ) is generally a small island. Definitions vary, and are not precise, but some suggest that an islet is a very small, often unnamed, island with little or no vegetation to support human habitation. It may be made of rock, sand and/ ...

in the middle of the marshy bay to the west of

Ras Siyyan Ras Siyyan or Ras Siyan () is a peninsula in the Obock Region of Djibouti, on the Bab-el-Mandeb strait (between the Red Sea and the Gulf of Aden), about 20 km southwest of Perim Island. The peninsula consists of a reddish volcanic hill about ...

peninsula. It is situated off the coast of

Djibouti Djibouti, officially the Republic of Djibouti, is a country in the Horn of Africa, bordered by Somalia to the south, Ethiopia to the southwest, Eritrea in the north, and the Red Sea and the Gulf of Aden to the east. The country has an area ...

, in the

Bab-el-Mandeb The Bab-el-Mandeb (), the Gate of Grief or the Gate of Tears, is a strait between Yemen on the Arabian Peninsula and Djibouti and Eritrea in the Horn of Africa. It connects the Red Sea to the Gulf of Aden and by extension the Indian Ocean. ...

strait between the

Red Sea The Red Sea is a sea inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab-el-Mandeb Strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and th ...

and the

Gulf of Aden The Gulf of Aden (; ) is a deepwater gulf of the Indian Ocean between Yemen to the north, the Arabian Sea to the east, Djibouti to the west, and the Guardafui Channel, the Socotra Archipelago, Puntland in Somalia and Somaliland to the south. ...

.
Sailing Directions (Enroute) - Red Sea and Persian Gulf
', page 161. National Geospatial Intelligence Agency pub. 172. Accessed 2012-07-6. The rock belongs to Djibouti's

Obock District The Obock Region (, , ) is a region in northern Djibouti. Covering an area of 4,700 square kilometres (1,800 sq mi), it had an estimated population of 37,856 as of 2009.The region borders the Red Sea, Bab-el-Mandeb, Gulf of Aden, Gulf of Tadjoura ...

. Rocher Siyyan is located about 800 m southwest from the volcanic hill that is the northern tip of Ras Siyyan, and about 1500 m from the mainland's shoreline. It is 55 meters long, up to 45 meters wide, and has an area of barely 2,000 square meters.

References

Islands of Djibouti Bab-el-Mandeb {{Djibouti-geo-stub