HardNature
"I am an animal that builds cities. I look like a plant and move like a rock. My city is home to a quarter of all ocean species. What am I?"
Answer
Coral
Explanation
Coral is an animal — a tiny polyp that builds a hard calcium carbonate skeleton. Coral reefs, built by billions of polyps over centuries, cover less than 1% of the ocean floor but support about 25% of all marine species.
This is a hard riddle in the Nature category — Riddles about the natural world, animals, weather and geography.
Featured in: Hard Riddles
Tags:animalsnatureocean
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