Coral Sea
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40 free Coral Sea trivia questions with answers — geography quiz, new questions added Oct 2026.
The Coral Sea lies off Australia's northeast coast and holds the largest reef system on Earth. It is also a place of odd stories: ships that vanished in storms, a naval battle in which the rival fleets never saw each other, and a handful of sandy islands that activists once declared an independent kingdom. These fun facts come as quiz questions with answers and short explanations. They cover the geography of the sea and its neighbours, the animals of the reefs, the explorers who charted the region and were wrecked on it, and the Second World War fighting that made the name famous. The quiz suits curious travellers, students, teachers planning a geography or ocean lesson, and anyone who enjoys a good piece of sea trivia.
30 of 40 questions with answers and explanations. Play the quiz
Q 01HMS Pandora sank on the Great Barrier Reef in 1791 while carrying captured mutineers from which famous ship?
HMS Bounty
HMS Bounty mutineers caught on Tahiti were locked in a makeshift deck cell that they called Pandora's Box.
Q 02The Battle of the Coral Sea, fought off Australia in World War II, was the first battle between which warships?
Aircraft carriers
Aircraft carriers did all the fighting: the opposing fleets never sighted or fired on each other, attacking over the horizon by air instead.
Q 03Activists declared a micronation on the remote Coral Sea Islands in 2004 to protest Australia's ban on what?
Same-sex marriage
Same-sex marriage campaigners sailed to Cato Island, raised a rainbow flag and named their campsite capital Heaven. The kingdom dissolved itself in 2017, after Australians voted yes to such weddings.
Q 04Which animated film sends its heroes riding the East Australian Current, which carries warm Coral Sea water south?
Finding Nemo
Finding Nemo opens on the edge of the Great Barrier Reef, and the real current is the largest ocean current close to Australia's shores.
Q 05When the steamer Yongala vanished in a 1911 Coral Sea cyclone, the only body ever found belonged to what?
A racehorse
A racehorse named Moonshine washed ashore, but no trace of the 122 passengers and crew was ever found. The wreck itself stayed lost until 1958.
Q 06James Cook named a Great Barrier Reef island in 1770 after which animal, the only land creature he saw there?
Lizard
Lizard Island's summit is still called Cook's Look, because he climbed it to chart a way out to sea through the maze of reefs.
Q 07Raine Island, on the outer edge of the Great Barrier Reef, is the world's largest nesting site for which animal?
Green turtles
Green turtles have nested on the tiny sand cay for more than 1,000 years, with tens of thousands of females arriving in a single season.
Q 08Which tech billionaire funded the 2018 expedition that found the wreck of USS Lexington on the Coral Sea floor?
Paul Allen
Paul Allen, the Microsoft co-founder, paid for the research vessel Petrel, which located the ship nicknamed Lady Lex more than 75 years after she was scuttled.
Q 09How does the crown-of-thorns starfish, the major predator of Coral Sea reefs, feed on living coral polyps?
By extruding its stomach
By extruding its stomach through its mouth over the coral, the starfish releases digestive enzymes and absorbs the liquefied tissue, leaving white feeding scars behind.
Q 10What is the only permanently staffed facility in Australia's Coral Sea Islands Territory, built on tiny Willis Island?
A weather station
A weather station set up in 1921 gives Queensland early warning of cyclones, and its handful of staff rotate every six months.
Q 11The Coral Sea, lying off the northeast coast of Australia, is a marginal sea of which ocean?
Pacific
Pacific Ocean waters fill the Coral Sea, which stretches about 2,000 kilometres down Australia's northeast coast to latitude 30 degrees south.
Q 12Which base, within bomber range of northern Australia, was Japan's invasion target at the Battle of the Coral Sea?
Port Moresby
Port Moresby, in what is now Papua New Guinea, was spared when Japan recalled its troop convoy, the first time in the war that a major Japanese advance was turned back.
Q 13Which island nation, bounding the Coral Sea on the east, was formerly known as the New Hebrides?
Vanuatu
Vanuatu sits entirely inside the Coral Sea under the official hydrographic limits, which run down the eastern coasts of its islands.
Q 21Which sea does the Coral Sea merge with to the south, along the parallel of 30 degrees south?
Tasman Sea
Tasman Sea waters are cooler: the East Australian Current carries warm Coral Sea water south into them, running strongest around February.
Q 22Which peninsula, the northernmost extremity of mainland Australia, forms the western shore of the northern Coral Sea?
Cape York
Cape York Peninsula marks the join: official charts draw the Coral Sea's western limit from New Guinea to its north-west tip.
Q 23Which archipelago in the Coral Sea is ringed by the world's longest continuous barrier reef, enclosing a vast lagoon?
New Caledonia
Q 14Which ship, commanded by James Cook, ran aground on a Coral Sea reef in 1770 and needed seven weeks of repairs?
Endeavour
Endeavour was refloated only after the crew threw six cannons and ballast overboard. Divers found the cannons in 1969.
Q 15Which plant-eating marine mammal is drawn in large numbers to the seagrass beds of the Great Barrier Reef?
Dugong
Dugong herds graze the fifteen species of seagrass found around the reef, and native title holders keep a legal right to hunt them for non-commercial needs.
Q 16Marine heatwaves in 2016, 2017 and 2020 caused which damaging event across the corals of the Great Barrier Reef?
Mass bleaching
Mass bleaching also struck in 1998, 2002 and 2006, and it leaves the corals that survive more susceptible to disease.
Q 17Which whales migrate through the Coral Sea Islands between June and November each year?
Humpback
Humpback whales share the territory's waters with resident dwarf minke whales and many species of toothed whale.
Q 18Losses at the Coral Sea kept the Japanese ships Shōkaku and Zuikaku out of which decisive battle a month later?
Midway
Midway was fought in June 1942 without the two ships: Shōkaku was under repair and Zuikaku had lost too many planes and pilots.
Q 19Which strait between Australia and New Guinea is named after a navigator who sailed through it for Spain in 1606?
Torres
Torres Strait got its name from the Scottish geographer Alexander Dalrymple, who found the navigator's testimony among captured Spanish documents.
Q 20Which Category 5 cyclone passed directly over Willis Island in 2011 before striking Queensland near Mission Beach?
Yasi
Yasi was strong enough to alter the shape of Willis Island and strip much of its vegetation; the four staff had been evacuated the day before.
New Caledonia's reef and lagoon joined the UNESCO World Heritage List in 2008, and the lagoon covers about 24,000 square kilometres.
Q 24Which natural resource was briefly mined on several remote Coral Sea islands during the 1870s and 1880s?
Guano
Guano, the seabird droppings prized as fertiliser, drew miners to the cays, but no permanent settlements were ever established.
Q 25Which navigator, shipwrecked on Wreck Reefs in the Coral Sea in 1803, took a small boat back to Sydney for help?
Matthew Flinders
Matthew Flinders and thirteen others made the trip in a ship's cutter they renamed Hope, and he returned with rescue vessels for the stranded crews.
Q 26Which explorer turned away from breakers off the Great Barrier Reef in 1768, two years before James Cook arrived?
Louis de Bougainville
Louis de Bougainville, namesake of the bougainvillea flower, was sailing west in search of a southern continent when the surf forced him to steer north and east.
Q 27Who built the 1844 stone beacon on Raine Island, the oldest European structure in tropical Australia?
Convicts
Convicts raised the tower on the orders of the British Admiralty because the surrounding waters were treacherous, though it never served as a lighthouse.
Q 28Which American admiral, reporting to Chester Nimitz, commanded the Allied naval forces at the Battle of the Coral Sea?
Frank J. Fletcher
Frank J. Fletcher was handed the command as a stopgap until William Halsey's task force could reach the area.
Q 29How did the United States learn of Japan's plan to invade by sea before the Battle of the Coral Sea?
Signals intelligence
Signals intelligence had confirmed most of the plan's details and targets by late April, giving the Allies time to send their ships to meet it.
Q 30USS Lexington, lost at the Battle of the Coral Sea, had originally been authorized in 1916 as what kind of ship?
A battlecruiser
A battlecruiser hull was already under construction when the Washington Naval Treaty of 1922 halted such ships, so she was converted while still being built.