Persian Gulf

Also called: Arabian Gulf · Topic: World Physical Features and Natural Regions · NCERT: Beyond NCERT

Meaning

The Persian Gulf (also called the Arabian Gulf) is a shallow arm of the Indian Ocean. It lies between Iran to the north-east and the Arabian Peninsula to the south-west, and it has only one way out to the open sea: the narrow Strait of Hormuz.

It matters because large oil and gas reserves lie in and around it. Most ships carrying this oil and gas must pass through Hormuz, one of the world's most important oil chokepoints. This makes the Gulf central to world energy supply and to India's energy security.

Explanation

Shape and setting

• Gulf: a large part of the sea that cuts deep into the land. It usually has a narrow mouth.

• The Persian Gulf fits this exactly. It cuts deep into West Asia and opens to the ocean only through Hormuz.

• Route to the open ocean: Persian Gulf → Strait of Hormuz → Gulf of Oman → Arabian Sea → Indian Ocean.

• Strait: a narrow strip of water that joins two larger water bodies. Hormuz joins the Persian Gulf and the Gulf of Oman.

Why its water is very salty

• The Gulf is shallow.

• A shallow sea holds less water, so it heats up quickly under the desert sun.

• There is high evaporation.

• The hot, dry climate of West Asia makes a lot of water evaporate. The salt stays behind.

• It is almost closed in.

• The only opening is the narrow Hormuz, so little less-salty ocean water mixes in.

• Result: the Persian Gulf is a very salty sea. It is a good example of how relief (shallow depth) and climate (heat and dryness) control the salinity of a sea.

Hormuz: the chokepoint

• Chokepoint: a narrow strait that many ships must pass through. If it is blocked, world trade slows down.
• Oil flow before 2026:
• About 20.3 million barrels of crude oil and petroleum products passed through Hormuz each day [3].

• This was roughly 25% of the world's sea-borne oil trade [3].

• Hormuz crisis, 2026:

• The Israeli–US bombing of Iran began on 28 February 2026. Since then, ship traffic through Hormuz has almost stopped [4].
• Hormuz carries about one-fifth of the world's oil supply and up to one-third of world trade in fertiliser raw materials (UN, April 2026) [4].
• A ceasefire was extended in April 2026, but trade stayed disrupted (verify current) [4].

The eight bordering countries

• Iran, Iraq, Kuwait, Saudi Arabia, Bahrain, Qatar, the UAE and Oman.
• Each of the tricky ones is a different kind of land:
• Bahrain is an island country inside the Gulf.
• Qatar is a peninsula (land with water on three sides) that sticks out into the Gulf.
• Oman touches the Gulf only through its Musandam exclave at Hormuz. An exclave is a piece of a country cut off from its main land.

Where it occurs

• Region: West Asia, between Iran and the Arabian Peninsula.
• North-east shore: Iran.
• South-west and western shore: Iraq, Kuwait, Saudi Arabia, Bahrain, Qatar and the UAE.
• At the mouth: the Strait of Hormuz, with Iran on one side and Oman (Musandam) on the other.
• Beyond Hormuz: the Gulf of Oman, then the Arabian Sea, which washes India's west coast.
• India's link:
• India imports much of its crude oil and LPG from the Gulf countries.
• Millions of Indian workers live in the Gulf countries.
• Under Op SANKALP (from June 2019), the Indian Navy escorts Indian-flagged merchant ships through Hormuz [1].
• Up to the end of 2022, it had deployed 36 warships and escorted about 361 lakh tonnes of cargo on 453 Indian-flagged ships [1].

Don't confuse with

• Gulf of Oman: this lies outside Hormuz, between Iran and Oman. It links Hormuz to the Arabian Sea. The Persian Gulf lies inside Hormuz.
• Red Sea: a long, narrow rift sea (formed when the African and Arabian plates pulled apart) on the other side of Arabia. Its chokepoints are Bab-el-Mandeb and the Suez Canal, not Hormuz.
• Gulf of Aden: an arm of the Arabian Sea between Yemen and Somalia. It joins the Red Sea at Bab-el-Mandeb and has nothing to do with Hormuz.
• Arabian Gulf: this is not a different water body. It is another name for the same Persian Gulf.

Prelims Hooks

• The Persian Gulf has 8 bordering countries: Iran, Iraq, Kuwait, Saudi Arabia, Bahrain, Qatar, the UAE and Oman.
• Trap: Jordan, Yemen and Israel do not border the Persian Gulf.
• Oman touches the Gulf only through the Musandam exclave. Bahrain is an island. Qatar is a peninsula.
• Hormuz joins the Persian Gulf and the Gulf of Oman. Bab-el-Mandeb joins the Red Sea and the Gulf of Aden.
• The shores of Hormuz belong to Iran and Oman (Musandam).
• Op SANKALP (from June 2019) is the Indian Navy's escort mission through the Gulf and Hormuz [1]. Do not mix it up with the Gulf of Aden anti-piracy patrols (since October 2008) [2].

Mains Points

• Hormuz and India's energy security (GS-III):
• India imports much of its crude oil and LPG through Hormuz. Any block there hits India's fuel supply and prices.
• The 2026 Hormuz crisis cut traffic in oil, LNG and fertiliser raw materials [4]. This also put India's farm inputs at risk.

• India's response: naval escorts under Op SANKALP [1], more varied import sources, and strategic petroleum reserves.

• Physical geography explains its salinity (GS-I):

• The Gulf is shallow, the climate is hot and dry, and evaporation is high.
• It is almost closed in, so little ocean water mixes in.

• Result: it is a very salty sea. Compare it with the Black Sea, which has low salinity because big rivers pour fresh water into it. This shows how relief, rivers and climate shape the salinity of seas.

• The Gulf as a strategic region (GS-I/GS-II link):

• Large oil and gas reserves and a single narrow outlet make the Gulf a flashpoint in world politics.
• Millions of Indian workers in the Gulf countries make its stability a matter of jobs and money sent home, not just oil.

Related concepts

• Red Sea
• Gulf of Aden
• Horn of Africa
• Black Sea
• South China Sea
• Spratly and Paracel Islands
• Gulf of Guinea

Read more

• Seas and gulfs in the news