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Crangon vulgaris, the common sand-shrimp; male.
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Common Shrimp (Crangon vulgaris).
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Common Shrimp, Crangon vulgaris, Fabr.; male.
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Shrimps and Prawns: Above on Right (Crangon vulgaris); Above on Left (Crangon horcas); In the Center (Pandalus annulicosnis); To the right and middle below (Hippolyte sp); To the left below (Hippolyte pusiola); to the left of center (Mysis stenolepis).
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In this underside (ventral) view of the head the subchelate first pereopods can be clearly seen. In this dorsal view of the head the small rostrum and the single median spine behind it can be seen. The arrangement of the eyestalks can also be clearly seen.
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Most crangonids have a very stubby rostrum, seen here as the small "horn" between the eyes for Crangon alaskensis
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Shrimp; garnaal.
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As with all Crangonids, the first pereopod of Crangon alaskensis is subchelate and the carpus of the second pereopod (visible just above the chela) is simple rather than multiarticulated.
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The upper posterolateral margin of abdominal segment 5 has no spines, as seen in this dorsal view. Anterior is to the right, and segment 6 is to the left.
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The dactyl of the 5th pereopod is not broad and flattened.
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Abdominal segment 6 has a dorsal median groove (sulcus) but no median ridge. Anterior is to the right and the tailfan is to the left.
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The carapace is smooth and has one median spine a short distance behind the eyes, as can be seen silhouetted in this view from the right side.
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The ventral sides of abdominal segments 5 (right) and 6 (left) are both smooth and clear, with no median groove (sulcus). This view is an oblique view of the right pleura and the ventral side from the right side of the shrimp. The base of leg 5 can be seen at the right.
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The 5th segment of the abdomen (left full segment in this photo) has no spines on the posterolateral margin (right edge of segment), and the 6th segment (middle of photo) has no longitudinal dorsal ridge. The uropods and telson are to the right.
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The feathery exopods of the pleopods are typically held out to the side. They are used for swimming and likely also for burrowing.
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The ventral side of abdominal segment 6 has a median groove, visible as the light-colored area in this photo.
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This individual was carrying a large batch of white eggs.
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The antennal scale of the second antennae, being held out by my finger in this photo, is more than twice as long as wide and the spine on the end (left side of scale) is longer than the flatter lamella (right side of end of scale)
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Crangon alba captured in Padilla Bay tide flats (Photos by: Dave Cowles, July 2008)
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A view of the whole, live animal ffom which the parts above were photographed. Photo by Dave Cowles, July 2005
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Crangon alba captured in Padilla Bay tide flats (Photos by: Dave Cowles, July 2008)