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The blue coral is the only extant octocoral with a massive skeleton, [3] which is composed of fibrocrystalline aragonite (calcium carbonate). It is a hermatypic zooxanthellaete species with either blue or green-grey polyps located within its skeleton, with each containing eight tentacles. Its colonies are either columnar, plate like or branched.
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The Amazon Reef (also referred to as the Amazonian Reef) is an extensive coral and sponge reef system, located off the coast of French Guiana and northern Brazil. It is one of the largest reef systems in the world known to exist, with scientists estimating its length to be over 600 miles (970 km) long, and covering over 3,600 square miles ...
Elizabeth Reef image from NASA Millennium Coral Reef Mapping Project Middleton Reef image from NASA Millennium Coral Reef Mapping Project. Elizabeth and Middleton Reefs Marine National Park Reserve is a former marine protected area consisting of waters around Elizabeth and Middleton reefs located at the south-eastern end of the Coral Sea Islands, an Australian territory in the Coral Sea. [2]
The channel runs east to west from 1.8 to 30 m (6 to 98 ft) deep with a fine white sand bottom, numerous mounds and patches of branching corals under the deep blue water. The north lagoon is an enclosed triangular coral reef platform partly exposed during low tide. It is relatively shallow with depths of about 2–10 m (7–33 ft).
Heliopora coerulea (Pallas, 1766) - blue coral Heliopora fijiensis † Hoffmeister, 1945 Heliopora hiberniana Richards, Yasuda, Kikuchi, Foster, Mitsuyuki, Stat, Suyama & Wilson, 2018 [ 2 ]
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.
This hard coral is common in shallow water exposed to surge, in the highest wave energy environments. [8] M. flabellata is less common and more restricted to shallow reef habitat, colonies of the species were found between 1 and 4 m depth. [9] The species is a broadcasting, simultaneous hermaphrodites that release egg-sperm bundles. [9]