Ocean and Marine Life Quiz: 12 Great Underwater Questions

Oct. 12, 2022.

Daily Trivia: Test your knowledge of life underwater with this Oceanic and Marine Life Quiz. What’s a “red tide”? Is the world’s largest coral reef system in danger? Which underwater animal families have immortal members? And what’s marine snow?

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Marine Life Quiz

Daily Trivia: 12 General Knowledge Questions and Answers about ocean and marine life, No time limit. An underwater fact follows each entry. How smart were you today?

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1. How long might a coelacanth fish live?

Photo: Alberto Fernandez Fernandez, CC BY-SA 3.0, via Wikimedia Commons

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2. What’s a “red tide”?

Photo: Jeff Schmaltz, MODIS Rapid Response Team, NASA/GSFC, via Wikimedia Commons

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3. What is Coral Bleaching?

Photo: Matt Kieffer from London, United Kingdom, CC BY-SA 2.0, via Wikimedia Commons

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4. Where is the world’s largest coral reef system?

Photo: Toby Hudson, CC BY-SA 3.0, via Wikimedia Commons

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5. What’s the world’s largest plant?

Photo: Rachel Austin / The University of Western Australia

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6. Which oceanic mammal doesn’t belong on this list?

Screenshot: Nat Geo Wild on YouTube

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7. What’s Jonah’s icefish?

Photo: A research team from the Alfred Wagner Institute.

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9. What’s a hydra?

Photo: Przemysław Malkowski, CC BY-SA 3.0, via Wikimedia Commons

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10. What’s marine snow?

Photo: NOAA National Ocean Service, Public domain, via Wikimedia Commons

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11. Which company is the world’s biggest plastic polluter?

Photo: Raceforwater, CC BY-SA 4.0, via Wikimedia Commons

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12. Which natural phenomenon is nicknamed in New Zealand “aurora of the sea”?

Sander van der Wel, CC BY-SA 2.0, via Wikimedia Commons

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The Ocean and Marine Life Quiz Questions

Here’s the complete list of our aquatic life trivia quiz questions.

Ocean and Marine Life Quiz - Underwater Trivia
  • How long might a coelacanth fish live?

    Photo: Alberto Fernandez Fernandez, CC BY-SA 3.0, via Wikimedia Commons
    Up to 100 years.
    Up to 100 months.
    Up to 100 weeks.
    Up to 100 days.

    What's a "red tide"?

    Photo: Jeff Schmaltz, MODIS Rapid Response Team, NASA/GSFC, via Wikimedia Commons
    A political wave towards left-wing governments in Latin America.
    The period between high tide and low tide when the sea level falls.
    The discoloration of the sea surface by harmful algal blooms.
    A cocktail comprising vodka and pomegranate juice.

    Where is the world's largest coral reef system?

    Photo: Toby Hudson, CC BY-SA 3.0, via Wikimedia Commons
    Mexico.
    Philippines.
    Australia.
    United States.

    What is Coral Bleaching?

    Photo: Matt Kieffer from London, United Kingdom, CC BY-SA 2.0, via Wikimedia Commons
    A disinfector for home use.
    The main reason for the world’s corals disappearing.
    An Eco-Friendly household cleaning product.
    A fabric pattern.

    What's a hydra?

    Photo: Przemysław Malkowski, CC BY-SA 3.0, via Wikimedia Commons
    The fish’s backbone.
    Flowering underwater plants native to Europe and Africa.
    A freshwater invertebrate animal about a half-inch long.
    A three-headed water snake.

    What's Jonah's icefish?

    Photo: A research team from the Alfred Wagner Institute.
    An Antarctic deep water fish.
    An Antarctic whale.
    An American fishery chain.
    A type of refrigerator.

    Which oceanic mammal doesn’t belong on this list?

    Screenshot: Nat Geo Wild on YouTube
    Orca (killer whale).
    Blue whale.
    Fin whale.
    Gray whale.

    What's marine snow?

    Photo: NOAA National Ocean Service, Public domain, via Wikimedia Commons
    It’s snow falling on the ocean.
    It’s material falling to the deep ocean.
    It’s a by-product of coral bleaching.
    Ocean foam on the water surface.

    Which natural phenomenon is nicknamed in New Zealand "aurora of the sea"?

    Sander van der Wel, CC BY-SA 2.0, via Wikimedia Commons
    The sun reflecting on the sea.
    Manmade light pollution.
    A local cruise ship.
    Blooms of plankton that glow after nightfall.

    What's the world's largest plant?

    Photo: Rachel Austin / The University of Western Australia
    Poseidon’s ribbon weed.
    The General Sherman tree.
    Mediterranean tapeweed.
    The Indian banyan.

    Which company is the world's biggest plastic polluter?

    Photo: Raceforwater, CC BY-SA 4.0, via Wikimedia Commons
    Unilever.
    Coca-Cola.
    PepsiCo.
    Nestlé.

    Which animal families have immortal members?

    Photo: © Tony Wills / CC BY-SA 4.0 via iNaturalist.NZ
    Corals and sea worms.
    Hydra and jellyfish.
    Marine sponges and crabs.
    Sea cucumbers and dolphins.

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