Coral polyps, the reef's building blocks ... Follwing a full-moon night or two each year, immobile stony corals like acropora millepora release egg and sperm bundles simultaneously in an orgy ...

Corals are made up of tiny living organisms called coral polyps, which attach themselves to the sea floor. When polyps die, they become hard, and new polyps grow on top of them. Gradually ...

Our Planet, the incredible new documentary series narrated by Sir David Attenborough, explores the beauty of life on Earth and highlights the threats that we pose to it. In the coastal seas episode, ...