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Reefs are formed of colonies of coral polyps held together by calcium carbonate Learn about symbiosis, reef biodiversity and the powerful connection between coral reefs, seagrass and mangroves. [1] most coral reefs are built from stony corals, whose polyps cluster in groups

Coral belongs to the class anthozoa in the animal phylum cnidaria, which includes sea anemones and. Discover how coral reefs work, why they’re vital to marine life and how tiny coral polyps build vast underwater ecosystems Coral reefs are among the most biologically diverse and valuable ecosystems on earth

This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them.

Coral reef, ridge or hummock formed in shallow ocean areas by algae and the calcareous skeletons of coral polyps and other coelenterates A coral reef may grow into a permanent coral island Often called ‘rainforests of the sea,’ coral reefs are home to a spectacular variety of organisms. A coral reef is a term used to describe the collective structure of hard corals that help shape a coral reef ecosystem

Coral reefs are some of the most diverse ecosystems in the world Coral polyps, the animals primarily responsible for building reefs, can take many forms Large reef building colonies, graceful flowing fans, and even small, solitary organisms. Coral reefs are the most diverse of all marine ecosystems

This is a remarkable statistic when you consider that reefs cover just a tiny fraction (less than one percent) of the earth’s surface and less than two percent of the ocean bottom.

Reefs provide a large fraction of earth’s biodiversity —they have been called “the rainforests of the seas.” scientists estimate that 25 percent of all marine species live in and around coral reefs, making them one of the most diverse habitats in the world. Coral reefs are vast underwater structures composed of calcium carbonate skeletons secreted by tiny marine invertebrates called coral polyps Coral reefs are another integral part of marine ecosystems and it is important to understand what they are and how they contribute positively to our environment __ what are coral reefs

A coral reef is a colony of hundreds of thousands of individual animals called coral polyps.

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