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🧠 Ocean quiz questions

20 entries

Read each question, pick an answer, then tap “Show the answer”. The questions are made from the checked facts on the globe.

  1. Which of these animals is the heaviest?

    1. Saltwater crocodile
    2. Amazon river dolphin (boto)
    3. Common bottlenose dolphin
    Show the answer

    Answer: A. Saltwater crocodile
    Saltwater crocodile (400 kg) · Amazon river dolphin (boto) (150 kg) · Common bottlenose dolphin (250 kg)

    💡 It can swim long distances out at sea and is sometimes found far from land.

  2. Which of these is the deepest?

    1. Titanic wreck
    2. Challenger Deep (bathyscaphe Trieste)
    3. Bismarck wreck
    Show the answer

    Answer: B. Challenger Deep (bathyscaphe Trieste)
    Titanic wreck (3,800 m) · Challenger Deep (bathyscaphe Trieste) (10.9 km) · Bismarck wreck (4,790 m)

    💡 In 1960 Jacques Piccard and Don Walsh became the first people to reach the bottom, in the bathyscaphe Trieste.

  3. Which of these animals is the heaviest?

    1. Atlantic bluefin tuna
    2. Polar bear
    3. Green sea turtle
    Show the answer

    Answer: B. Polar bear
    Atlantic bluefin tuna (240 kg) · Polar bear (380 kg) · Green sea turtle (130 kg)

    💡 Under its white-looking fur, a polar bear's skin is black.

  4. Which of these animals can live the longest?

    1. Atlantic puffin
    2. Great white shark
    3. Brown pelican
    Show the answer

    Answer: B. Great white shark
    Atlantic puffin (41 years) · Great white shark (70 years) · Brown pelican (31 years)

    💡 Off South Africa, great whites sometimes leap completely out of the water while chasing seals.

  5. Which of these is the deepest?

    1. Lusitania wreck
    2. USS Arizona Memorial, Pearl Harbor
    3. Antikythera wreck
    Show the answer

    Answer: A. Lusitania wreck
    Lusitania wreck (93 m) · USS Arizona Memorial, Pearl Harbor (12 m) · Antikythera wreck (50 m)

    💡 A German submarine sank the liner off Ireland in 1915, which helped turn American opinion against Germany in World War I.

  6. Which of these animals swims the fastest?

    1. Walrus
    2. Orca
    3. Humpback whale
    Show the answer

    Answer: B. Orca
    Walrus (35 km/h) · Orca (56 km/h) · Humpback whale (27 km/h)

    💡 Each orca pod has its own set of calls, a little like a family dialect.

  7. Which of these animals goes the deepest?

    1. Giant manta ray
    2. Leatherback sea turtle
    3. Sperm whale
    Show the answer

    Answer: C. Sperm whale
    Giant manta ray (1,000 m) · Leatherback sea turtle (1,280 m) · Sperm whale (2,250 m)

    💡 Sperm whales take short naps hanging upright and still near the surface.

  8. Which of these animals is endangered?

    1. Whale shark
    2. Electric eel
    3. Blue tang
    Show the answer

    Answer: A. Whale shark

    💡 Its spot pattern is unique to each shark, so researchers can identify individuals from photos.

  9. Which of these is a bird?

    1. Seahorse
    2. Emperor penguin
    3. Marine iguana
    Show the answer

    Answer: B. Emperor penguin

    💡 Males keep the egg warm on their feet through the dark Antarctic winter for about two months.

  10. Which of these animals swims the fastest?

    1. Beluga whale
    2. Sea otter
    3. Adélie penguin
    Show the answer

    Answer: A. Beluga whale
    Beluga whale (22 km/h) · Sea otter (9 km/h) · Adélie penguin (15 km/h)

    💡 Belugas are nicknamed "sea canaries" because of their many whistles, clicks and chirps.

  11. Which of these animals is the longest?

    1. Antarctic krill
    2. American lobster
    3. Clownfish
    Show the answer

    Answer: B. American lobster
    Antarctic krill (6 cm) · American lobster (23 cm) · Clownfish (11 cm)

    💡 Lobsters keep growing all their lives by shedding their old shell.

  12. Which of these animals can live the longest?

    1. Scalloped hammerhead
    2. Tiger shark
    3. Blue whale
    Show the answer

    Answer: C. Blue whale
    Scalloped hammerhead (35 years) · Tiger shark (50 years) · Blue whale (90 years)

    💡 Its calls are among the loudest sounds made by any animal.

  13. Which of these animals is the longest?

    1. Tiger pufferfish (fugu)
    2. European anchovy
    3. African penguin
    Show the answer

    Answer: C. African penguin
    Tiger pufferfish (fugu) (40 cm) · European anchovy (15 cm) · African penguin (65 cm)

    💡 It was nicknamed the "jackass penguin" because its call sounds like a braying donkey.

  14. Which of these is a bird?

    1. California sea lion
    2. Gentoo penguin
    3. Loggerhead sea turtle
    Show the answer

    Answer: B. Gentoo penguin

    💡 The gentoo is the fastest-swimming bird, reaching about 36 km/h underwater.

  15. Which of these animals swims the fastest?

    1. Gray whale
    2. Harbor seal
    3. West Indian manatee
    Show the answer

    Answer: C. West Indian manatee
    Gray whale (16 km/h) · Harbor seal (19 km/h) · West Indian manatee (30 km/h)

    💡 Manatees are distant relatives of elephants.

  16. Which of these is the deepest?

    1. Edmund Fitzgerald wreck
    2. San José galleon
    3. Galápagos Rift hydrothermal vents
    Show the answer

    Answer: C. Galápagos Rift hydrothermal vents
    Edmund Fitzgerald wreck (160 m) · San José galleon (600 m) · Galápagos Rift hydrothermal vents (2,500 m)

    💡 Found in 1977, these were the first hydrothermal vents ever seen, surrounded by giant tube worms that live without sunlight.

  17. Which of these animals is the lightest?

    1. King penguin
    2. Wandering albatross
    3. Sockeye salmon
    Show the answer

    Answer: C. Sockeye salmon
    King penguin (13 kg) · Wandering albatross (8.5 kg) · Sockeye salmon (4.5 kg)

    💡 Sockeye salmon find their way back to the stream where they hatched largely by smell.

  18. Which of these animals goes the deepest?

    1. Fin whale
    2. Southern elephant seal
    3. Common octopus
    Show the answer

    Answer: B. Southern elephant seal
    Fin whale (316 m) · Southern elephant seal (2,390 m) · Common octopus (200 m)

    💡 A male's inflatable, trunk-like nose makes its roars louder when it fights rivals.

  19. Which of these animals is endangered?

    1. Giant clam
    2. Magellanic penguin
    3. Red Sea anemonefish
    Show the answer

    Answer: A. Giant clam

    💡 Algae living in its colourful mantle make food from sunlight and share it with the clam.

  20. Which of these animals swims the fastest?

    1. Dugong
    2. Box jellyfish
    3. Great barracuda
    Show the answer

    Answer: C. Great barracuda
    Dugong (20 km/h) · Box jellyfish (7 km/h) · Great barracuda (58 km/h)

    💡 Young barracudas often swim in schools, but large adults usually hunt alone.

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