File:Holothuria mexicana (donkey dong sea cucumber) (San Salvador Island, Bahamas) 2 (15958921679).jpg
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[edit]DescriptionHolothuria mexicana (donkey dong sea cucumber) (San Salvador Island, Bahamas) 2 (15958921679).jpg |
Holothuria mexicana Ludwig, 1875 - donkey dung sea cucumber. Holothurians (sea cucumbers) are bizarre animals. They lack the obvious pentaradial symmetry of other echinoderms (starfish, sand dollars, etc.). They have soft, elongated, flexible bodies. Their skeletons consist of numerous, tiny, calcareous sclerites embedded in the body wall or covering the outer surface of the body. In general, sea cucumbers are benthic and vagrant, slowly moving around on the seafloor. They use mucus to collect organic debris from the seafloor and then consume the debris-covered mucus. Some holothurians can discharge internal organs and toxins from their posterior in response to potential predators. Rough handling of sea cucumbers by people can result in the same discharge behavior. Classification: Animalia, Echinodermata, Holothuroidea, Aspidochirotida, Holothuriidae Locality: Pigeon Creek estuary, southeastern San Salvador Island, eastern Bahamas |
Date | |
Source | Holothuria mexicana (donkey dong sea cucumber) (San Salvador Island, Bahamas) 2 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15958921679. It was reviewed on 3 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 May 2015
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/320 sec (0.003125) |
F-number | f/4 |
ISO speed rating | 80 |
Date and time of data generation | 14:37, 14 March 2013 |
Lens focal length | 11.614 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 02:56, 30 December 2014 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 14:37, 14 March 2013 |
Meaning of each component |
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Image compression mode | 2 |
APEX shutter speed | 8.3125 |
APEX aperture | 4 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 2,844 px |
Image height | 1,572 px |
Date metadata was last modified | 21:56, 29 December 2014 |
IIM version | 2 |