Ocean Life Quiz
Sharks, octopuses, coral reefs and the strange creatures of the deep sea.
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About the Ocean Life Quiz
The oceans are home to an enormous variety of life, much of it still undiscovered. Dive into this quiz about sharks, whales, octopuses, coral reefs and the bizarre animals of the deep.
This quiz has 20 questions, served in rounds of 10 with a fresh mix and shuffled answers every time you play. Every answer comes with a short explanation.
Sample Ocean Life Questions & Answers
Q1. What is the largest fish in the ocean?
✅ Answer: Whale shark
💡 Whale sharks can exceed 12 metres, but they feed mainly on plankton.
Q2. How many hearts does an octopus have?
✅ Answer: Three
💡 Two hearts pump blood through the gills and one pumps it around the body.
Q3. What are coral reefs built by?
✅ Answer: Tiny animals called polyps
💡 Coral polyps build limestone skeletons that form reefs over thousands of years.
Q4. Which sea creature has no brain, heart or bones?
✅ Answer: Jellyfish
💡 Jellyfish are about 95 percent water and use a simple nerve net.
Q5. In seahorses, which parent carries the eggs until they hatch?
✅ Answer: The male
💡 The female deposits eggs in the male’s pouch, where they develop.