All mysteries
Mystery #4Tier 2coral reefs

Why does a coral reef bustle with more creatures than almost anywhere in the sea?

A coral reef is one of the most crowded places on Earth. Fish of every colour dart about, and creatures hide in every crack. More kinds of animal live here than almost anywhere else in the whole sea. Why does a coral reef bustle with more creatures than almost anywhere in the sea?

A Red Sea coral reef crowded with orange anthias fish darting among branching corals of every shape
Photo: Daviddarom · Public domain · via Wikimedia Commons

Your guess

What do you think the reef gives all those creatures that makes them want to live there?

There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.

Make a guess to unlock the hints and the answer.