Learn why the Great Barrier Reef must be protected from climate change. Under the waves, the Great Barrier Reef is a colourful wonderland. It is the world's largest coral reef and is home to one-quarter of all ocean species. This brilliantly designed picture book introduces young children to the extraordinary undersea world, with its bright coral gardens and rainbow-colored aquatic critters. Readers will discover amazing marine species, how the coral reef benefits our seas, and why it is critical that we act to safeguard this special aquatic landscape from the effects of climate change.