File:Nautilus Pompilius.jpg
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Summary[edit]
DescriptionNautilus Pompilius.jpg |
The Chambered Nautilus (Nautilus pompilius) is the best-known species of nautilus. The shell, when cut away as in the photograph in the gallery below, reveals a lining of lustrous nacre and displays a nearly perfect equiangular spiral. The shell exhibits countershading, being light on the bottom and dark on top. This is to help avoid predators because when seen from above, it blends in with the darkness of the sea, and when seen from below, it blends in with the light coming from above. The animal has more primitive eyes than some other cephalopods; the eye has no lens and thus is comparable to a pinhole camera. The animal has about 90 tentacles with no suckers, which is also different from other cephalopods. This nocturnal animal has a pair of rhinophores, which detect chemicals, and uses olfaction and chemotaxis in order to find its food. Taken in the Blue Reef Aquarium Southsea, Portsmouth. Comments welcome. |
Date | |
Source |
Nautilus pompilius - The Chambered Nautilus
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Author | Daniel Davis from Southsea, UK |
Camera location | 50° 46′ 48.19″ N, 1° 05′ 32.85″ W | View this and other nearby images on: OpenStreetMap | 50.780054; -1.092458 |
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This image, originally posted to Flickr, was reviewed on December 16, 2011 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date. |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:11, 16 December 2011 | 1,024 × 768 (458 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{Information |Description=The Chambered Nautilus (Nautilus pompilius) is the best-known species of nautilus. The shell, when cut away as in the photograph in the gallery below, reveals a lining of lustrous nacre and displays a nearly perfect equiangular |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Sony Ericsson |
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Camera model | W800i |
Date and time of data generation | 16:37, 11 March 2007 |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/2.8 |
ISO speed rating | 100 |
Y and C positioning | Co-sited |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Exif version | 2.2 |
Supported Flashpix version | 1 |
Color space | sRGB |
Image width | 1,632 px |
Image height | 1,224 px |
Date and time of digitizing | 16:37, 11 March 2007 |
APEX exposure bias | 0 |
Metering mode | Center weighted average |
Light source | Fluorescent |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Subject distance range | Macro |
Flash | Flash did not fire |
File change date and time | 19:26, 22 October 2010 |
Software used | Adobe Photoshop CS3 Windows |
Date metadata was last modified | 19:26, 22 October 2010 |