File:Udotea flabellum (mermaid's fan alga) Bahamas.jpg

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Udotea flabellum (Ellis & Solander, 1786) - mermaid's fan alga on shallow, aragonitic sandy seafloor.

Udotea is a calcareous green alga - the fan-shaped blade has tiny particles of aragonite (CaCO3 - calcium carbonate). After the alga dies and the soft parts decay away, the aragonitic portions become clay- & silt-sized seafloor sediments. A significant percentage of shallow seafloor and shoreline sediments in the Bahamas is from calcareous algae. Many carbonate petrologists suggest that ancient fine-grained limestones (micritic limestones; micrites) are diagenetically altered deposits of calcareous green algae.

Classification: Chlorophyta, Caulerpales, Halimedaceae

Locality: shallow seafloor just west of North Point Peninsula, southeastern Graham's Harbour, northeastern San Salvador Island, eastern Bahamas
Date
Source Udotea flabellum (mermaid's fan alga) (San Salvador Island, Bahamas) 2
Author James St. John

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This image, originally posted to Flickr, was reviewed on 28 December 2014 by the administrator or reviewer Leoboudv, who confirmed that it was available on Flickr under the stated license on that date.

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22 June 2010

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current00:48, 28 December 2014Thumbnail for version as of 00:48, 28 December 20141,417 × 1,291 (617 KB)TillmanCropped 28 % horizontally and 12 % vertically using CropTool with lossless mode.
00:47, 28 December 2014Thumbnail for version as of 00:47, 28 December 20141,965 × 1,467 (919 KB)TillmanTransferred from Flickr via Flickr2Commons

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