The Arabian Sea is a region of the Indian Ocean bounded on on the north by Pakistan and Iran, on the south by northeastern Somalia, on the east by India and on the west by the Arabian Peninsula. Some of the ancient names of this body of water include Sindhu Sagar (meaning "Sea of Sindh" in Sanskrit) and Erythraean Sea.
Major ports :
The Port of Karachi is Pakistan's largest and busiest seaport, handling about 60% of the nation's cargo (25 million tons per annum). It is located between the Karachi towns of Kiamari and Saddar, close to the main business district and several industrial areas. The geographic position of the port places it in close proximity to major shipping routes such as the Strait of Hormuz.
The history of the port is intertwined with that of the city of Karachi. Several ancient ports have been attributed in the area including "Krokola", "Morontobara" (Woman's Harbour) (mentioned by Nearchus), Barbarikon (the Periplus of the Erythraean Sea, and Debal (a city captured by the Muslim general Muhammad bin Qasim in 712 CE). There is a reference to the early existence of the port of Karachi in the "Umdah", by the Arab navigator Sulaiman al Mahri (AD 1511), who mentions "Ras al Karazi" and "Ras Karashi" while describing a route along the coast from Pasni to Ras Karashi.
Karachi is also mentioned in the sixteenth century Turkish treatise Mir'ât ül Memâlik (Mirror of Countries, 1557) by the Ottoman captain Seydi Ali Reis, which is a compilation of sailing directions from the Portuguese island of Diu to Hormuz in the Persian Gulf. It warns sailors about whirlpools and advises them to seek safety in "Kaurashi" harbour if they found themselves drifting dangerously.
There are several islands in the Arabian Sea, with the largest being Socotra (Republic of Yemen), Masirah (Sultanate of Oman), Astola Island (Islamic Republic of Pakistan) and Andrott (Republic of India).
Astola Island, also known as Jezira Haft Talar or 'Island of the Seven Hills', is a small, uninhabited island in the northern tip of the Arabian Sea in Pakistan's territorial waters. It is a popular eco-tourism destination in the region.Overnight tourists camp on the island and bring their own provisions. Camping, fishing and scuba-diving expeditions are popular. It is also a site for observing turtle breeding. Endangered animals such as the Green turtle (Chelonia mydas) and the Hawksbill turtle (Eretmochelys imbracata) nest on the beach at the foot of the cliffs. The island is also a very important area for endemic reptiles such as the Astola Viper (Echis carinatus astolae).
Socotra : is the largest island, being part of a small archipelago of four islands. It lies some 240 kilometres (150 mi) east of the Horn of Africa and 380 kilometres (240 mi) south of the Arabian Peninsula. The island is very isolated and through the process of speciation, a third of its plant life is found nowhere else on the planet. It has been described as the most alien-looking place on Earth.
Masirah : is an island off the East coast of Oman. The main industries here are fishing and traditional textile manufacturing. Formerly, traditional ship building was important. The rugged terrain of the island and surrounding rough coastline has led to the appearance of many wrecked dhows on the beaches of the island, most of them well preserved by the salt water and intense heat. The ocean bottom environment surrounding Masirah is hostile as the majority of the area is covered in either sand or hard rock. Despite the poor quality ocean bottom, the area is very productive with marine fisheries, and any hard objects (barrels, engines) are immediately colonized by local fauna.