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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 ...
Araucaria columnaris, the coral reef araucaria, Cook pine (or Cook's pine), New Caledonia pine, Cook araucaria, or columnar araucaria, is a species of conifer in the family Araucariaceae. Distribution
The classification of corals has been discussed for millennia, owing to having similarities to both plants and animals. Aristotle's pupil Theophrastus described the red coral, korallion, in his book on stones, implying it was a mineral, but he described it as a deep-sea plant in his Enquiries on Plants, where he also mentions large stony plants that reveal bright flowers when under water in ...
The baseline survey of marine biodiversity in the Solomon Islands that was carried out in 2004, [1] found 474 species of corals in the Solomons as well as nine species which could be new to science. This is the second highest diversity of corals in the World, second only to the Raja Ampat Islands in eastern Indonesia.
The colors of these algae are most typically pink, or some other shade of red, but some species can be purple, yellow, blue, white, or gray-green. Coralline algae play an important role in the ecology of coral reefs. Sea urchins, parrot fish, and limpets and chitons (both mollusks) feed on coralline algae.
Coral reefs are some of the most biodiverse habitats on earth, supporting large numbers of species of corals, fish, molluscs, worms, arthropods, starfish, sea urchins, other invertebrates and algae. Because of the photosynthetic requirements of the corals, they are found in shallow waters, and many of these fringe land masses. [ 24 ]
Acropora is a genus of small polyp stony coral in the phylum Cnidaria. [3] Some of its species are known as table coral, elkhorn coral, and staghorn coral. Over 149 species are described. [4] Acropora species are some of the major reef corals responsible for building the immense calcium carbonate substructure that supports the thin living skin ...
Although It is considered an invasive species in some places, Turbinaria Ornata is not considered a problem species in the Hawaiian islands. [6] Turbinaria ornata have had a massive population explosion on the reefs around the globe due to their ability to alter their morphology according to hydrodynamic forces and their ability to produce air ...