File:Mytilus edulis (Atlantic blue mussel shell) with encrusting calcareous algae (Mt. Desert Island, Maine, USA).jpg
![File:Mytilus edulis (Atlantic blue mussel shell) with encrusting calcareous algae (Mt. Desert Island, Maine, USA).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Mytilus_edulis_%28Atlantic_blue_mussel_shell%29_with_encrusting_calcareous_algae_%28Mt._Desert_Island%2C_Maine%2C_USA%29.jpg/730px-Mytilus_edulis_%28Atlantic_blue_mussel_shell%29_with_encrusting_calcareous_algae_%28Mt._Desert_Island%2C_Maine%2C_USA%29.jpg?20200305182344)
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[edit]DescriptionMytilus edulis (Atlantic blue mussel shell) with encrusting calcareous algae (Mt. Desert Island, Maine, USA).jpg |
English: Mytilus edulis Linnaeus, 1758 - Atlantic blue mussel shell in Maine, USA. (photo by Mary Ellen St. John)
Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, usually using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. Seen here is the interior surface of a disarticulated Atlantic blue mussel shell, Mytilus edulis. This species occurs in much of the North Atlantic Ocean. Mussels are sessile, benthic, epifaunal, filter-feeding, hard substrate encrusters that are abundant in many intertidal rocky shore environments. They attach to substrates such as rockgrounds, hardgrounds, etc. by extruding byssus (a type of organic material), in the form of byssal threads. Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Mytiloida, Mytilidae Locality: Mt. Desert Island, southern-coastal Maine, USA See info. at: en.wikipedia.org/wiki/Blue_mussel |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/49609915807/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/49609915807 (archive). It was reviewed on 5 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 March 2020
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current | 18:23, 5 March 2020 | ![]() | 1,446 × 1,187 (1.55 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49609915807/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot S2 IS |
Exposure time | 1/160 sec (0.00625) |
F-number | f/4 |
ISO speed rating | 50 |
Date and time of data generation | 18:18, 11 September 2006 |
Lens focal length | 36.6 mm |
Width | 2,048 px |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 10:56, 2 March 2020 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 18:18, 11 September 2006 |
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Image compression mode | 3 |
APEX shutter speed | 7.3125 |
APEX aperture | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
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File source | Digital still camera |
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Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.0-72.0 mm |
Date metadata was last modified | 05:56, 2 March 2020 |
Unique ID of original document | 01B6A807F19414EBE24DCC365E8A34C3 |
IIM version | 24,576 |