File:Lobsters for sale at Talapipa Market, Boracay.jpg
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[edit]DescriptionLobsters for sale at Talapipa Market, Boracay.jpg |
English: PUBLISHED:
altavistadeboracay.com.ph/amp/blog/exciting-boracay-long-... Spiny lobsters, also known as langouste or rock lobsters, are a family (Palinuridae) of about 60 species of achelate crustaceans, in the Decapoda Reptantia. Spiny lobsters are also, especially in Australia, New Zealand, South Africa, and the Bahamas, sometimes called crayfish, sea crayfish, or crawfish ("kreef" in South Africa), terms which elsewhere are reserved for freshwater crayfish. Although they superficially resemble true lobsters in terms of overall shape and having a hard carapace and exoskeleton, the two groups are not closely related. Spiny lobsters can be easily distinguished from true lobsters by their very long, thick, spiny antennae, by the lack of chelae (claws) on the first four pairs of walking legs, although the females of most species have a small claw on the fifth pair, and by a particularly specialized larval phase called phyllosoma. True lobsters have much smaller antennae and claws on the first three pairs of legs, with the first being particularly enlarged. Spiny lobsters have typically a slightly compressed carapace, lacking any lateral ridges. Their antennae lack a scaphocerite, the flattened exopod of the antenna. This is fused to the epistome (a plate between the labrum and the basis of the antenna). The flagellum, at the top of the antenna, is stout, tapering, and very long. The ambulatory legs (pereopods) end in claws (chelae).[ Spiny lobsters are found in almost all warm seas, including the Caribbean and the Mediterranean Sea, but are particularly common in Australasia, where they are referred to commonly as crayfish or sea crayfish (Jasus edwardsii), and in South Africa (Jasus lalandii). Spiny lobsters tend to live in crevices of rocks and coral reefs, only occasionally venturing out at night to seek snails, clams, sea-hares, crabs, or sea urchins to eat. Sometimes, they migrate in very large groups in long files of lobsters across the sea floor. These lines may be more than 50 lobsters long. Spiny lobsters navigate using the smell and taste of natural substances in the water that change in different parts of the ocean. It was recently discovered that spiny lobsters can also navigate by detecting the Earth's magnetic field. They keep together by contact, using their long antennae. Potential predators may be deterred from eating spiny lobsters by a loud screech made by the antennae of the spiny lobsters rubbing against a smooth part of the exoskeleton. Spiny lobsters usually exhibit the social habit of being together. However recent studies indicate that healthy lobsters move away from infected ones, leaving the diseased lobsters to fend for themselves. en.wikipedia.org/wiki/Spiny_lobster |
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Source | https://www.flickr.com/photos/21186555@N07/32948132606/ |
Author | Ray in Manila |
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This image was originally posted to Flickr by Ray in Manila at https://flickr.com/photos/21186555@N07/32948132606. It was reviewed on 16 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
16 March 2020
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Camera manufacturer | Canon |
Camera model | Canon PowerShot G9 |
Exposure time | 1/80 sec (0.0125) |
F-number | f/3.2 |
ISO speed rating | 200 |
Date and time of data generation | 22:22, 24 October 2010 |
Lens focal length | 12.733 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Lightroom 6.4 (Macintosh) |
File change date and time | 20:13, 19 February 2017 |
Exif version | 2.3 |
Date and time of digitizing | 14:22, 24 October 2010 |
APEX shutter speed | 6.321928 |
APEX aperture | 3.356144 |
APEX exposure bias | 0 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Color space | sRGB |
Focal plane X resolution | 13,745.704467354 |
Focal plane Y resolution | 13,698.630136986 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
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 |
Image compression mode | 5 |
Supported Flashpix version | 1 |
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Rating (out of 5) | 4 |
Date metadata was last modified | 04:13, 20 February 2017 |
Unique ID of original document | uuid:681B89EE00E4DF11B79FDC277C160F37 |
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IIM version | 4 |