The Sea of Monsters
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50 free The Sea of Monsters trivia questions with answers — literature quiz, new questions added Oct 2026.
The Sea of Monsters is the second Percy Jackson novel, and the one where the series finds its sea legs. The magical borders that protect Camp Half-Blood are failing, Percy's best friend Grover is in serious trouble somewhere far out on the water, and the only cure for the camp lies at the end of a voyage that retraces the route of the Odyssey. Rick Riordan fills the trip with old myths in modern disguise, a surprising addition to Percy's family, and an ending that changes the direction of the whole series. This quiz follows the book from the opening school day to the final chapter back at camp. Questions cover the main characters and the gods who help or hinder them, the creatures and enchantments met along the way, the ships, gifts and magical objects that keep the heroes alive, and the twists of the closing chapters. A handful look at how the story was written and how it reached the screen. It is written for readers who have just finished the novel, students getting ready for a class test or an AR-style reading quiz, and longtime fans checking how much of Percy's second summer they still remember. Every answer comes with a short explanation.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Which gym-class game becomes a battle with cannibal giants on Percy Jackson's last day of school?
Dodgeball
Dodgeball turns deadly when the visiting players start hurling flaming balls, and the wrecked gym gets Percy expelled from yet another school.
Q 02Which homeless classmate of Percy Jackson turns out to be his Cyclops half-brother?
Tyson
Tyson is a young Cyclops who grew up on the streets, and when Poseidon claims him at camp, Percy is embarrassed to share a father with a monster.
Q 03What do mortals call the Sea of Monsters, where Percy Jackson hunts for the Golden Fleece?
The Bermuda Triangle
The Bermuda Triangle is the mortal name for the Sea of Monsters, and the book blames its magical residents for the ships and planes that vanish there.
Q 04At an island spa in The Sea of Monsters, a sorceress transforms Percy Jackson into which animal?
A guinea pig
A guinea pig is her updated version of the swine in the Odyssey, and many of the men she transforms are sold off as classroom pets.
Q 05What is Grover wearing in Percy Jackson's dreams as he tries to fool the Cyclops who captured him?
A wedding dress
A wedding dress helps Grover pass as a bride-to-be for his nearsighted captor, and he stalls the ceremony by quietly unthreading the gown, a trick borrowed from Penelope in the Odyssey.
Q 06Which Cyclops, once blinded by Odysseus, holds Grover prisoner on an island in The Sea of Monsters?
Polyphemus
Polyphemus keeps the Golden Fleece on his island because its magic lures in satyr searchers, who then become his dinner.
Q 07Which cursed spirit, doomed never to reach food or drink, replaces Chiron at Camp Half-Blood?
Tantalus
Tantalus takes over as activities director, plays favorites with Clarisse, and openly mocks Percy's newly arrived half-brother.
Q 08Which god, the father of Luke Castellan, secretly equips Percy Jackson for his sea voyage?
Hermes
Hermes meets Percy on the beach disguised as a jogger and hands over supplies, hoping the trip will give his runaway son a chance to come back.
Q 09Thalia, revived by the Golden Fleece at the end of The Sea of Monsters, is the daughter of which god?
Zeus
Zeus is her father, so her return gives the Great Prophecy a second child of the three eldest gods and the enemy another hero to manipulate.
Q 10Which sorceress from the Odyssey runs C.C.'s Spa and Resort in The Sea of Monsters?
Circe
Circe goes by the initials C.C. at her island resort, where women are pampered with makeovers while male visitors meet a far worse fate.
Q 11Which fatal flaw does Annabeth Chase admit to after the Sirens nearly lure her to her death?
Hubris
Hubris, or deadly pride, is the flaw she names once the island is behind them; the song had shown her a Manhattan rebuilt to her own design and her parents reunited.
Q 12What is the name of the monster-filled cruise ship that Luke Castellan commands?
Princess Andromeda
Princess Andromeda is named for the mythical royal chained to a rock for a sea monster, and its mortal passengers drift about in a trance, blind to the creatures on board.
Q 13Percy Jackson flees a sorceress's island on the Queen Anne's Revenge, the ship of which pirate?
Blackbeard
Q 21Which trio of hags, sharing one eye and one tooth, drives the taxi that rushes Percy Jackson to camp?
The Gray Sisters
The Gray Sisters, called Anger, Tempest and Wasp, bicker over their one eye at the wheel until Percy grabs it and demands answers.
Q 22The numbers 30, 31, 75 and 12, given to Percy Jackson by three taxi drivers, turn out to be what?
Latitude and longitude
Latitude and longitude are what Percy finally recognises at the campfire: 30 degrees 31 minutes north, 75 degrees 12 minutes west, the spot where Grover is being held.
Q 23Which fire-breathing bronze beasts is Clarisse fighting at the camp border when Percy Jackson arrives?
Colchis bulls
Blackbeard and his crew had spent centuries caged by the sorceress, and Percy can sail the old ship single-handed because he is the sea god's son.
Q 14In The Sea of Monsters, the pirate freed from a sorceress's cage shares which godly father with Clarisse?
Ares
Ares fathered them both, and he also supplies his daughter's transport, raising a sunken warship because the losing side of any war owes him a debt.
Q 15Whose remains lie in the golden sarcophagus aboard Luke Castellan's cruise ship?
Kronos
Kronos re-forms a little more inside the coffin each time a demigod renounces the gods to join him, which is why Luke is so keen to recruit.
Q 16What do the rowdy centaurs who rescue Percy Jackson from Luke's cruise ship call themselves?
The Party Ponies
The Party Ponies are Chiron's root-beer-loving cousins, and they storm the deck firing paintball guns and arrows tipped with boxing gloves.
Q 17Which long-banned contest does the new activities director revive at Camp Half-Blood?
Chariot races
Chariot races had been scrapped after three deaths and twenty-six mutilations, yet under the new rules killing a rival costs only a week without s'mores.
Q 18Which third book in the Percy Jackson series follows directly after The Sea of Monsters?
The Titan's Curse
The Titan's Curse arrived a year later and opens with Percy, Annabeth and Thalia joining Grover at a boarding school to bring out two powerful demigods.
Q 19Which actor plays Percy Jackson in the 2013 film Percy Jackson: Sea of Monsters?
Logan Lerman
Logan Lerman returned from the first film, and although the sequel laid the groundwork for another chapter, a third movie was never produced.
Q 20Which streaming service's Percy Jackson series adapted The Sea of Monsters as its second season?
Disney+
Disney+ premiered the season in December 2025, with author Rick Riordan credited as co-creator of the show alongside Jonathan E. Steinberg.
Colchis bulls were forged by Hephaestus with silver horns and ruby eyes, and Percy is saved from one of them when his fireproof half-brother charges in.
Q 24Which bronze-beaked man-eaters, once driven off by Heracles, swoop down on Camp Half-Blood?
Stymphalian birds
Stymphalian birds get in because the camp's magical border is failing, and the new director blames Percy and his friends for stirring them up.
Q 25Whose crooning, blasted from Chiron's boombox, drives a flock of killer birds away from Camp Half-Blood?
Dean Martin
Dean Martin does the trick: his recording of Volare panics the flock so Apollo's archers can shoot, much as Heracles once scared the same birds with a rattle.
Q 26What is sealed inside the thermos that a god hands Percy Jackson before he sets sail?
The four winds
The four winds are packed inside, a nod to the bag of winds Aeolus gives Odysseus, and one small twist of the lid sends a lifeboat racing away from Luke's ship.
Q 27What does Annabeth Chase pour into the cage to turn Percy Jackson and his fellow captives back into men?
Multivitamins
Multivitamins from a god do the job, standing in for moly, the magic herb that shields Odysseus from the same sorceress in Homer's epic.
Q 28What name does Percy Jackson's half-brother give the hippocampus he rides in The Sea of Monsters?
Rainbow
Rainbow is unusually big for a hippocampus, strong enough to carry a Cyclops, and later hauls his rider out of the wreck of Clarisse's ship.
Q 29Clarisse sails for the Sea of Monsters aboard which Confederate ironclad, crewed by dead soldiers?
CSS Birmingham
CSS Birmingham is the book's own invention rather than a real Civil War vessel, and its cannons, refitted to fire celestial bronze, blow the Hydra to pieces.
Q 30Which whirlpool monster guards the entrance to the Sea of Monsters opposite six-headed Scylla?
Charybdis
Charybdis appears as a giant mouth that gulps down the sea and spits it out again, and the strain of escaping her blows up the engine of Clarisse's ship.