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Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton. A coral "group" is a colony of very many genetically identical polyps. Each polyp is a sac-like animal typically only a few millimeters in diameter and a few centimeters in height.
A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. [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 ...
Coral sand is a form of aragonite sand particles originating in tropical and sub-tropical marine environments primarily from bioerosion of limestone skeletal material of marine organisms. Often, this is due to corallivores , such as parrotfish, which excrete sand after digestion. [ 1 ]
Precious coral, or red coral, is the common name given to a genus of marine corals, Corallium. ... Poseidon resided in a palace made of coral and gems, ...
The mound region is made up of cold-water coral mounds, which are corals "shaped like bumps or pinnacles on the seafloor and can range in height from about ten feet to hundreds of feet tall, but ...
Bamboo coral, family Keratoisididae (formerly Isididae [1] [2]) is a family of coral of the phylum Cnidaria. [ 3 ] [ 4 ] It is a commonly recognized inhabitant of the deep sea, due to the clearly articulated skeletons of the species. [ 5 ]
The coral was discovered at the southeastern tip of the Solomon Islands, in an area known as the Three Sisters. It was spotted by a National Geographic team embarking on a scientific expedition in ...
“Just when we think there is nothing left to discover on planet earth, we find a massive coral made of nearly 1 billion little polyps, pulsing with life and color,” said Enric Sala, National ...