Arabian Sea
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40 free Arabian Sea trivia questions with answers — geography quiz, new questions added Oct 2026.
The Arabian Sea is the north-western arm of the Indian Ocean, wedged between the Arabian Peninsula, Pakistan, India and the Horn of Africa. For thousands of years it was the main road between East and West. Sailors learned to ride its reversing monsoon winds, and spices, textiles and ideas moved along its shores long before European ships arrived. This quiz gathers the fun facts people go looking for. It covers the geography of the sea, from its biggest island to the narrow straits at its corners, and the weather that rules it. It also takes in the whales, turtles and glowing plankton that live in its waters, the great port cities on its coasts, and the explorers and navigators who made the crossing famous. It suits a student working on an oceans project, a traveler heading for India's west coast or the Gulf, or a quiz host who wants a geography round with a few surprises. The early questions are ones most people can reason out. The later ones reward anyone who knows the history of Indian Ocean trade in detail. Every answer comes with a short explanation.
30 of 40 questions with answers and explanations. Play the quiz
Q 01Bombay duck, a pungent sun-dried delicacy from India's Arabian Sea coast, is actually what kind of animal?
A fish
A fish, not a bird: Bombay duck is a species of lizardfish, and the odd name has been turning up in print since at least 1815.
Q 02Which river is the largest to flow into the Arabian Sea?
Indus
Indus is the root of the word India, though the river's lower course and its large delta now lie in Pakistan.
Q 03Which Portuguese explorer crossed the Arabian Sea to Calicut in 1498, opening a sea route from Europe to India?
Vasco da Gama
Vasco da Gama made the crossing from Malindi in under a month, guided by a Gujarati pilot who knew the monsoon winds.
Q 04The Arabian Sea holds one of the world's largest 'dead zones', a deep layer of water almost empty of which gas?
Oxygen
Oxygen is so scarce in this layer that standard instruments sometimes cannot detect any at all. The zone is one of the three largest on Earth, and the other two are in the Pacific.
Q 05Unlike other humpbacks, the whales of the Arabian Sea, isolated for 70,000 years, never do what?
Migrate
Migrate is what other humpbacks do between cold feeding grounds and warm breeding grounds. This small group feeds and breeds in the same waters, mainly off Oman.
Q 06Which Chinese admiral, whose treasure fleets crossed the Arabian Sea in the 1400s, took a giraffe home to his emperor?
Zheng He
Zheng He's fleet carried the giraffe from Malindi in East Africa, and the Ming court took it for a qilin, a mythical beast of good omen.
Q 07Which island, the largest in the Arabian Sea, is famous for umbrella-shaped dragon's blood trees found nowhere else?
Socotra
Socotra's strange trees are named for their dark red resin, called dragon's blood, and the whole Yemeni island is a World Heritage Site.
Q 08The Carlsberg Ridge beneath the Arabian Sea takes its name from a beer company's foundation based in which country?
Denmark
Denmark's Carlsberg Foundation paid for the round-the-world Dana expedition of 1928 to 1930, whose research ship discovered the undersea ridge.
Q 09The word monsoon, used for the winds that rule the Arabian Sea, comes from an Arabic word meaning what?
Season
Season is the meaning of the Arabic word mawsim, which reached English by way of the Portuguese word monção.
Q 10Which traditional sailing vessel of the Indian Ocean carried Arabian Sea cargoes of dates and timber for centuries?
Dhow
Dhow hulls are long and thin, built to haul heavy merchandise along the coasts of Arabia, East Africa and South Asia with a crew of twelve to thirty.
Q 11Which Indian state, famed for its Arabian Sea beaches, was a Portuguese colony for about 450 years until 1961?
Goa
Goa is also India's smallest state by area, with a coastline only about 100 kilometers long.
Q 12India's summer monsoon, blowing off the Arabian Sea, normally strikes the mainland first in which state, around 1 June?
Kerala
Kerala's Malabar Coast gets the first downpours around 1 June, and by about 9 June the rains have moved up the coast to Mumbai.
Q 13Which waterway's opening in 1869 made the Arabian Sea part of the shortest shipping route between Europe and India?
Suez Canal
The Suez Canal cut about 8,900 km off the voyage from the Arabian Sea to London by sparing ships the long trip around Africa.
Q 21Which strait, whose Arabic name means Gate of Grief, links the Red Sea with the Gulf of Aden and the Arabian Sea?
Bab-el-Mandeb
Bab-el-Mandeb separates Yemen from Djibouti and Eritrea, and bab is simply the Arabic word for gate.
Q 22Which Indian port city, a spice-trading hub since antiquity, is nicknamed the Queen of the Arabian Sea?
Kochi
Kochi still lives by the trade: the Spices Board of India and the World Spice Organisation both have their headquarters in the city.
Q 23Which spice from India's Malabar Coast, shipped across the Arabian Sea to ancient Rome, was nicknamed black gold?
Pepper
Pepper was prized so highly that Alaric the Visigoth demanded 3,000 pounds of it as part of his ransom for the city of Rome.
Q 14Which narrow waterway, the Persian Gulf's only outlet to the open ocean, funnels oil tankers toward the Arabian Sea?
Strait of Hormuz
The Strait of Hormuz opens into the Gulf of Oman, the north-western arm of the Arabian Sea, and ranks among the world's most important shipping choke points.
Q 15Which Arabian Sea port, Pakistan's largest city, served as the country's first capital from 1947 to 1959?
Karachi
Karachi is still home to Pakistan's two largest seaports, the Port of Karachi and Port Qasim.
Q 16What event in 2013 raised Zalzala Koh, a short-lived island of mud, from the Arabian Sea off Pakistan?
An earthquake
An earthquake of magnitude 7.7 pushed the island up within hours. Its name means Earthquake Mountain, and by the end of 2016 it had sunk out of sight.
Q 17Which Hindu god's legendary city of Dwarka, on India's Gujarat coast, is said to lie drowned beneath the Arabian Sea?
Krishna
Krishna is said to have settled at Dwarka after killing his uncle Kamsa, and excavations off the modern town have found submerged settlements and stone anchors.
Q 18Which fragrant tree resin gives its name to a World Heritage Site in Dhofar, on Oman's Arabian Sea coast?
Frankincense
Frankincense left Dhofar through Khor Rori, a fortified port founded in the 3rd century BC whose ruins are part of the Land of Frankincense site.
Q 19Mumbai's Haji Ali Dargah stands on an islet in the Arabian Sea that visitors can reach on foot only at what time?
Low tide
Low tide uncovers a narrow causeway with no railings. At high water the sea covers the path and cuts the shrine off.
Q 20Each winter, vast blooms of the plankton Noctiluca turn parts of the Arabian Sea which color?
Green
Green is the color of the algae living inside each Noctiluca cell, and the same plankton flashes bright blue at night when the water is stirred.
Q 24The North Indian Ocean's cyclone basin has two halves: the quieter Arabian Sea and which stormier neighbor?
Bay of Bengal
The Bay of Bengal breeds most of the region's cyclones because the Arabian Sea has cooler surface water and stronger wind shear.
Q 25Which mountain range runs beside India's Arabian Sea coast, blocking monsoon winds and wringing out their rain?
Western Ghats
The Western Ghats force the wet air upward so it drops its rain on the coast, leaving the Deccan Plateau behind them in a dry rain shadow.
Q 26The Sultan of Muscat gave the Arabian Sea's Khuriya Muriya Islands as a gift to which British monarch?
Victoria
Victoria's new islands were valued for guano: Liverpool merchants dug out some 200,000 tons of the seabird-dropping fertilizer before the mining was abandoned in 1860.
Q 27Which Arabian Sea port on a hammerhead-shaped peninsula did Pakistan buy from the Sultan of Oman in 1958?
Gwadar
Gwadar had been an overseas possession of Muscat and Oman since 1783. Pakistan has since built a deep-water port there, near the oil shipping lanes out of the Persian Gulf.
Q 28Which Indian territory of coral atolls beside the Arabian Sea has a name meaning one hundred thousand islands?
Lakshadweep
Lakshadweep falls far short of its name, with just 36 islands and islets spread across 12 atolls.
Q 29Tim Severin's replica Arab ship Sohar set out across the Arabian Sea in 1980 with planks held together by what?
Coconut rope
Coconut rope, nearly 640 km of it rolled by hand from the husks, stitched the hull together for an eight-month voyage from Oman to China.
Q 30Which island in Mumbai's harbor, on India's Arabian Sea coast, holds World Heritage cave temples dedicated to Shiva?
Elephanta
Elephanta got its name from Portuguese colonists, who found stone elephant statues at the caves.