They include the so-called precious coral (also called red, or rose, coral) used in jewelry.
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It was the fourth mass bleaching to hit the reef in recorded history – all since 1998 – and coral scientists are alarmed the increasing regularity of these events gives stressed coral precious little chance to recover.
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Options range from debris monitoring to coral reef protection, and you’ll gain a broader appreciation for these precious ecosystems.
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Hydrocorals, which include the order Milleporina (millepores), commonly called fire coral, and the precious red coral used for jewelry, form encrusting or branching skeletons similar to those of anthozoan corals.
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Tyres occasionally break free, smash into coral on natural reefs and wash ashore.
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By the 1990s coral reefs off the coasts of more than 20 countries were being ravaged by coral bleaching, pollution, freighter traffic, and the venomous, coral-eating starfish known as the crown of thorns.
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Common types of stony coral include brain coral, mushroom coral, star coral, and staghorn coral, all named because of their appearance.
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A coral reef may grow into a permanent coral island.
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There are also fish swimming around the coral that feed on plankton and use the coral as shelter.
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There are 50 genera of coral snake mimics such as false coral snakes (see king snake and scarlet snake), and nearly one-third of all American species have some coral snake pattern.
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Coral bleaching is incredibly serious.
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Coral bleaches when the water it’s in is too warm for too long.
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Without that brownish internal photosynthetic factory pumping out meals for the coral, the underlying skeleton shines through the translucent coral flesh as bleach white, and the coral is at risk of starving to death.
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Pink coral species come mainly from the western Hawaiian atolls; black coral is also extracted from Hawaiian coral beds, from shallow seamounts, and from Malaysian and Indonesian waters.
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Coral islands consist of low land perhaps only a few metres above sea level, generally with coconut palms and surrounded by white coral sand beaches.
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Coral lagoons are restricted to tropical open seas that provide the conditions necessary for coral growth.
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In this process, coral lose the algae that normally live in their tissues, which can kill the coral within weeks if conditions do not improve.
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So, when coral death occurs, the impact is felt in the various species that eat coral, as well as those that rely on other species that live within coral colonies.
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At least the fluorescent coral, as opposed to the more-stressed stark white coral, has a better chance of bouncing back, he says.
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Coral bleaching, whitening of coral that results from the loss of a coral’s symbiotic algae (zooxanthellae) or the degradation of the algae’s photosynthetic pigment.
precious coral
noun substance
- the hard stony skeleton of a Mediterranean coral that has a delicate red or pink color and is used for jewelry
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