File:Strombus gigas shell (queen conch) (San Salvador Island, Bahamas) 1 (15955706170).jpg
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Summary
[edit]DescriptionStrombus gigas shell (queen conch) (San Salvador Island, Bahamas) 1 (15955706170).jpg |
Strombus gigas Linnaeus, 1758 - queen conch shell on shallow subtidal seafloor (aragonite sand substrate). (photo taken by Mark Peter) Gastropods are slug-like molluscs. They occur in marine, freshwater, and terrestrial environments. Many of them (snails) make a calcareous, coiled, external shell, which is used for protection from predators. A large species of marine gastropod (snail) in the waters around San Salvador Island is the Strombus gigas, the queen conch. It was formerly abundant but is now uncommon due to overharvesting by humans for food. "Conch fritters" are a common dish in the Bahamas. Bahamian law forbids harvesting of pre-adult queen conchs, but this rule is frequently ignored by scofflaws. Adult queen conchs have a flared apertural margin, whereas pre-adult individuals lack the flared aperture. The apertural inner surface has a lovely pinkish to reddish coloration. The fish near the center of the photo is a juvenile Halichoeres bivittatus (Bloch, 1791), a type of wrasse (common name "slippery dick") (Animalia, Chordata, Vertebrata, Actinopterygii, Perciformes, Labridae). The green-colored blades surrounding the shell are turtle grass (Thalassia testudinum König, 1805 - Plantae, Angiospermophyta, Najadales, Hydrocharitaceae). The thin, green-colored stalks surrounding the shell are manatee grass (Syringodium filiforme (Kützing, 1860) - Plantae, Angiospermophyta, Najadales, Cymodoceaceae). Classification: Animalia, Mollusca, Gastropoda, Strombidae Locality: seagrass bed in southeastern Graham's Harbour, northeastern San Salvador Island, eastern Bahamas |
Date | |
Source | Strombus gigas shell (queen conch) (San Salvador Island, Bahamas) 1 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15955706170. 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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current | 21:16, 3 May 2015 | 3,000 × 2,400 (5.65 MB) | Natuur12 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | OLYMPUS IMAGING CORP. |
Camera model | u1030SW,S1030SW |
Exposure time | 1/160 sec (0.00625) |
F-number | f/3.5 |
ISO speed rating | 80 |
Date and time of data generation | 14:50, 21 March 2009 |
Lens focal length | 5 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 20:55, 29 December 2014 |
Y and C positioning | Co-sited |
Exposure Program | Creative program (biased toward depth of field) |
Exif version | 2.21 |
Date and time of digitizing | 14:50, 21 March 2009 |
Meaning of each component |
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APEX exposure bias | 0 |
Maximum land aperture | 3.61 APEX (f/3.49) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Supported Flashpix version | 1 |
Image width | 3,000 px |
Image height | 2,400 px |
Date metadata was last modified | 15:55, 29 December 2014 |
IIM version | 2 |