The Great Barrier Reef off the coast of Australia is the world's largest living structure. Its magnitude is matched by its importance as an ocean habitat. Readers follow along on an exciting journey from one end of the reef to the other. They'll learn about issues that threaten this rainforest of the sea and the diversity of marine life found there, including venomous jellyfish, gentle dugongs, and aggressive sharks. Safety tips and fact boxes offer beneficial information, and beautiful photographs capture the qualities that make this one of the natural wonders of the world.