Coral reefs are like cities under the sea. The structure of the living corals themselves provides homes and hiding places for a huge range of marine life. Professor Ove Hoegh-Guldberg describes ...

Corals take a very long time to grow. On average they grow between 0.5 and 2cm per year. The reefs we see today have been growing over the past 5,000 to 10,000 years. Reefs are the largest ...