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Chasmagnathus granulata.
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All Biocode files are based on field identifications to the best of the researcher’s ability at the time.
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Aqua Silkeborg
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2002 California Academy of Sciences
CalPhotos
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Photographed in November 2005, this reed bed on the southern bank of Chiswick Eyot in the River Thames, London, is peppered with probable mitten crab burrows. The remnants of the collapsing bank can be seen on the beach in the foreground.
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The chelae in this species does not have purple spots, as does H. nudus.
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This individual is from Sares Head. Photo by Dave Cowles, Sept 2005
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Brush-clawed shore crab; Penseelkrab, Foto Fitis Sytske Dijksen.
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The legs of H. oregonensis have setae, as visible here.
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Notice that the purple spots on the chelae are less distinct on this individual than on some. Photo by Dave Cowles, Sept 2005
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East asian shore crab; blaasjeskrab.
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2013 California Academy of Sciences
CalPhotos
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View of the underside of a female (left) and a male (right). Note the broader, more rounded abdomen on the female and the narrower, pointed abdomen on the male.
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Many crabs "slobber" bubbles when out of water because they are pumping air and water in their gill chambers, whose outlets are near the mouth. Photo by Dave Cowles, Sept 2005
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Reindert Nijland, www.krabben.net
Ecomare
Chinese mitten crab; Chinese wolhandkrab.
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1999 California Academy of Sciences
CalPhotos
purple shore crab
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Closeup of the underside of the abdomen of a female. Females in brachyuran crabs have pleopods on their abdomens which function to attach eggs to.
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Hemigrapsus nudus, San Simeon, CA. About 4 cm carapace width. (Photo by: Dave Cowles, May 1995)
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1999 California Academy of Sciences
CalPhotos
purple shore crab
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View of the underside of a male Hemigrapsus oregonensis. Male brachyuran crabs have no pleopods on their abdomen except for two hemipenes used for transferring sperm.
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1999 California Academy of Sciences
CalPhotos
purple shore crab
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The right chela of a male. There is a tuft of setae on the palm of the chela on males.
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