What is coral? How many types of creatures live on reefs? Why are some coral reefs turning white? This book has the answers to these questions and many more, along with photographs, step-by-step illustrations, simple text and links to websites with video clips and activities. Chapters in this book include:- Busy reefs- What is a coral?- Reef builders- Who lives on reefs?- Stinging tentacles- Coral crunchers- Creature cleaners- Reef sounds- Blending in- Super sponges- Baby corals- All kinds of reefs- Deep reefs- Rescuing reefs