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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.
Astronaut photo of Cape Town showing the Cape Peninsula, and surrounding waters, including False Bay. Map showing approximate extent of the range of the article and identifying key locations and the borders of the Table Mountain National Park Marine Protected Area Marine ecoregions of the South African exclusive economic zone Marine species distribution reference map of the Southern African ...
Recreation at Bloubergstrand, with Table Mountain in the background. Bloubergstrand / ˌ b l oʊ b ər ɡ ˈ s t r æ n d / is a seaside suburb of the City of Cape Town, South Africa, along the shores of Table Bay, 15 kilometres (9.3 mi) due north of the city centre of Cape Town.
Octocorallia (also known as Alcyonaria) is a class of Anthozoa comprising over 3,000 species [1] of marine organisms formed of colonial polyps with 8-fold symmetry. It includes the blue coral, soft corals, sea pens, and gorgonians (sea fans and sea whips) within three orders: Alcyonacea, Helioporacea, and Pennatulacea. [2]
The blue color of the skeleton (which is covered with a layer of brown polyps) is caused by iron salts. Blue coral can be used in tropical aquaria, and the crystalline calcareous fibres in the skeletons can be used for jewelry. Individual polyps have eight feathery tentacles and, in the gastrovascular cavity, eight septa, or partitions. Cilia ...
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A beach is a landform alongside a body ... A coral reef offshore is a ... South America and the Caribbean, the best recreational beaches are awarded Blue Flag ...
The Great Blue Hole, located near Ambergris Caye, Belize Dean's Blue Hole, Long Island, Bahamas Watling's Blue Hole, San Salvador Island, Bahamas. A blue hole is a large marine cavern or sinkhole, which is open to the surface and has developed in a bank or island composed of a carbonate bedrock (limestone or coral reef).