![]() X Factor’s viewing figures have fallen to a record low, calling into question the future of the ITV talent show. The audience for Blue Planet II, which included those watching recordings and repeats, was more than 2 million higher than the 11.63 million who saw the One Love Manchester concert in June, which was previously the year’s biggest TV audience.īlue Planet II comprehensively beating Strictly Come Dancing and the X Factor in the weekend ratings battle. By sending their young away from the reef, there is hope that they will regenerate new reefs and secure their future for generations to come.The consolidated audience made it not only the most watched programme of the year but the third most watched of the past five years, behind only the football World Cup final in 2014 and last year’s Great British Bake Off final. The programme unfolds with one of the greatest mass-spawning events in the oceans - corals, fish and invertebrates all releasing a snowstorm of eggs. Without the three-dimensional structure of a coral reef, all reef dwellers are affected. The most devastating bleaching event known in recorded history wreaks havoc on the Great Barrier Reef in Australia. In French Polynesia, thousands of grouper risk death when faced with hundreds of grey reef sharks in order to reproduce.ĭespite their longevity and resilience, increasing ocean temperatures have put coral reefs under unprecedented pressure. Reef creatures go to great lengths to give their young a head start in life and nowhere more so than on the remotest reefs in the world. ![]() But it is up to the big male to find a way for the female to lay her eggs. An extraordinary species of clownfish has made a home in an anemone away from the reef. But there is safe accommodation for some out here in these sandy suburbs. The bobbit, a giant carnivorous worm, buries deep in the sand in order to ambush unsuspecting prey. This makes it a dangerous place, especially at night when predators patrol in search of prey caught in the open. However, away from the protective structures of the reef there is nowhere to hide. On the sheltered side of the reef there are sand flats which provide rich feeding grounds. In the Maldives, on the biggest tides, one particular coral lagoon becomes so flooded with plankton that it attracts hundreds of manta rays. In the Bahamas, the rush of the water creates a truly strange phenomenon - a whirlpool. These ramparts protect the city from the ocean waves, but twice a day the walls are covered by the incoming tide. On the outer side, facing the open ocean, is the drop-off. ![]() These dolphins play by balancing corals and sponges on their nose and in doing so build important life skills.Įvery reef has a sharply defined boundary. For the youngsters, the reef is their playground. In the desert sands of Egypt, coral reefs thrive in the shallows of the Red Sea, providing bottlenose dolphins with a place to rest. Some animals come to reefs for rest and relaxation. ![]() She must wait for her opportunity to sneak back in. As she approaches the station, she is joined by more of her fellow turtles and is pushed out by the queue-jumping males. At dawn, one of the reef's most charismatic inhabitants, the green turtle, heads off to be cleaned at a special health spa. As these polyps grow and die they lay the limestone foundation for civilisations and superstructures so large that they can be seen from space.Ĭoral reef cities never sleep, they are constantly noisy worlds where a chorus of submarine song rings out from their many inhabitants. Filmed with super macro time-lapse, we bring them to life and reveal their hidden worlds. While they might appear to be nothing more than rocky substrate, each coral is in fact made up of hundreds to thousands of tiny, living coral creatures called polyps. On the Great Barrier Reef a remarkable grouper uses sign language, dubbed the headstand signal, to reach out to an entirely different creature, a reef octopus, to flush small fish out of their hiding holes and into the groupers waiting mouth. The broadclub cuttlefish has found its place by using a hypnotic display that apparently mesmerises its prey, causing it to let down its defences. For those that manage to establish themselves, there can be great rewards. There is fierce rivalry for space, for food and for a partner, but the reef is also a place full of opportunity. They are complex, infinitely varied structures providing all kinds of homes for their many residents. Their reefs occupy less than one tenth of one per cent of the ocean floor, yet they are home to a quarter of all known marine species. Corals build themselves homes of limestone in the warm, clear, shallow seas of the tropics.
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