Reefs are some of the most amazing habitats on earth, home to exotic fish, colourful corals, turtles and even sharks. Explore the reefs like a diver, and learn about how they formed, how they work, and how we can keep them safe for future generations to enjoy.

* Pearl/Band 18 books offer fluent readers a complex, substantial text with challenging themes to facilitate sustained comprehension, bridging the gap between a reading programme and longer chapter books.

* Text type: An information book

* Curriculum links: geography, science