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4,084. Corals record how many days there are in a year. (Earth & Coral) Orbit: Earth’s Extraordinary Journey I, BBC 2012
52,003. I have been enthralled by coral reefs ever since. (Animals & World & Earth & Nature & Coral) Attenborough: 60 Years in the Wild III: Our Fragile Planet, BBC 2012
52,051. At certain times of the year corals also release sexual cells into the water. Some of the larvae that result begin new colonies. (Animals & Coral) David Attenborough: Life on Earth (revised series)
52,572. The most impressive invertebrates may seem to be the giants but in fact it’s some of the smallest that can make the biggest impact. Every square inch of this island has been created by an every-growing living super-structure – a coral reef. It’s taken thousands of years to reach this size. And it all began with creatures smaller than a pin-head. (Animals & Ocean & Sea & Coral) Attenborough, Life: Creatures of the Deep e8
52,573. Corals are in fact extremely aggressive. And will fight to the death to expand their territory ... Then, just once a year, a few days after the November full moon, the corals take part in a mass spawning event. (Animals & Ocean & Sea & Coral) ibid.
52,637. Reefs are the work of polyps – tiny colonial animals like minute sea anemones. (Animals & Earth & Sea & Coral) David Attenborough, Planet Earth: Shallow Seas e9
52,805. To date the Coral Reef Project has identified more than a thousand likely new species. (Ocean & Coral) David Attenborough, Horizon: The Death of our Oceans? 2010
68,533. Coral reefs are some of the most complex eco-systems on the planet. Richer even than tropical rain forests, they are home to a quarter of all marine fish species. Corals may look like plants, but they are in fact two species: an animal – the coral, and tiny algal guests that live within the corals’ bodies. (Coral & Earth) Attenborough Explores ... Our Fragile World
68,534. Corals are highly sensitive to changes in the water temperature. Even a rise of one to two degrees Celsius will stress the coral polyps, and they will expel ... their microscopic algal partners. The algi give the corals their colour, so once expelled the corals will turn white. This event is called Coral Bleaching. But if the changes are short-lived the corals will recover. (Coral & Earth) ibid.
68,535. Corals face another side-effect of global warming ... storms. And strong storms produce rough seas. (Coral & Earth) ibid.
112,503. Tropical coral reefs occupy only a tenth of 1% of the ocean floor, but their shallow warm waters and stable year-round conditions support some of the most crowded and varied communities to be found anywhere in the oceans. (Ocean & Coral Reef) David Attenborough, Blue Planet II e1, BBC 2017
112,549. As far down as three and a half miles there are more species of coral in the deep than on shallow tropical reefs. (Antarctica & Ocean & Coral) David Attenborough, Blue Planet II e2: The Deep
112,828. In a far corner of south-east lies the coral triangle. A cluster of the richest coral reefs in the world. Undersea cities crammed full of life. (Ocean & Coral Reef) David Attenborough, Blue Planet II e3: Coral Reefs
112,829. A cuttlefish – it specialises in hunting crabs. But a large crab is a dangerous quarry – it has powerful claws. The cuttlefish however has a remarkable talent – its skin contains millions of pigment cells with which it can create ever changed colours and patterns. (Ocean & Coral Reef) ibid.
112,830. Coral colonies can continue to grow for centuries, possibly millennia. And they can build structures that can reach as high as a house. (Ocean & Coral Reef) ibid.
52,890. Coral is vital to the health of the ocean. (Oceans & Seas & Coral) Oceans III: Red Sea
52,905. Coral reefs support a quarter of all fish species and help support the coastal people here. (Ocean & Sea & Coral & Fish) Oceans VI: Indian Ocean - Coastal Waters
52,906. Corals use chemical and biological warfare. (Ocean & Sea & Coral) ibid.
52,907. Coral grows at about one centimetre a year. (Ocean & Sea & Coral) ibid.
98,300. Black corals are the slowest growing corals in the world. (New Zealand) New Zealand: Earth’s Mythical Islands II, BBC 2016
98,949. Deep-water corals and sponges cover the rocky slopes, and see lilies face into the slow deep current which sweeps food particles to their outstretched arms. (Ocean & Coral) Light the Ocean, National Geographic 2016
105,447. The Great Barrier Reef off the coast of Australia stretches over 350,000 kilometres and is home to 1,500 species of fish, 4,000 species of mollusks and 400 species of coral. The equilibrium of every ocean depends on these corals. (Earth & Coral) Home, 2009
131,884. Australia’s Great Barrier Reef has lost a third of its coral and is now in danger of collapse. Australians are caught in the grip of a bitter culture war over climate change and its impact on the reef. Australia’s farmers also stand accused of damaging the reef. Our World: The Battle for the Great Barrier Reef, BBC 2019