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Ocean Life

From sunlit reefs down to the pitch-black midnight zone, meet the swimmers, stingers and singers you share a planet with. Ready to get wet?

🦁 Animals medium 20 questions ~7 min
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What this quiz asks

  • Which is the largest fish in the ocean?
  • Dolphins are mammals rather than fish.
  • What do blue whales eat almost exclusively?
  • Coral reefs are built by which kind of animal?
  • Jellyfish belong to which animal group?
  • Is a seahorse a fish?
  • What is the name for the light that deep-sea animals generate inside their own bodies?
  • Select ALL of these sea creatures that are mammals.
  • Which ocean layer, beginning around 1,000 metres down, receives no sunlight at all?
  • In seahorses, which parent carries the developing young?
  • Which of these animals can regrow a lost limb, and sometimes an entire body from one?
  • The narwhal's famous spiralling tusk is actually an overgrown what?
  • Sea otters wrap themselves in kelp so they do not drift away while sleeping.
  • Order these ocean animals from smallest to largest adult size.
  • Coral bleaching happens when stressed corals expel what?
  • The deepest known point in the ocean is called what?
  • Which animal has the largest eyes of any creature on Earth?
  • Which fish grows up in European rivers but crosses the Atlantic to spawn in the Sargasso Sea?
  • Select ALL of these animals that are cephalopods.
  • Roughly how much does the heart of an adult blue whale weigh?