As with other members
of Family Crangonidae, this species has a subchelate
1 (photo) and the carpus
2 is not subdivided into several units. Crangon
alba has a very short rostrum
(photo). The dactyl
of leg 5 is not broad and flattened. The eyestalks are not
nor shielded by a hood made of spines (photo).
is smooth. It has a single median
dorsal spine shortly behind the rostrum (photo)
but no submedian spines. Abdominal segment 5 has no spines on
upper posterolateral margins (photo).
Abdominal segment 6 has no prominent longitudinal ridges on the dorsal
surface (photo) and also has no median
groove on the ventral surface (photo).
alba Holmes, 1900
Common name(s): Stout crangon
alba captured in Padilla
Bay tide flats
|(Photos by: Dave
How to Distinguish
Crangon franciscorum has a spine on the upper
of abdominal segment 5. C. handi, C.
C. nigricauda have a median
ventral groove on abdominal segment 6.
shrimp are common on sandy bottoms, where their camouflage helps them
in well. If disturbed they will often swim down to the sand,
their ventral surface on it, and quickly burrow out of sight (probably
using their pleopods--see the photo
Kozloff 1987, 1996
Joana, Claudia Moreira, Fabiana Freitas, and Henk W. van der Veer, 2012.
Short review of the eco-geography of Crangon.
Journal of Crustacean Biology 32:2 pp 159-169
General Notes and
abundances, unusual behaviors:
underside (ventral) view of the
head the subchelate
can be clearly seen.
view of the head the small
and the single median
spine behind it can be seen. The arrangement of the eyestalks
also be clearly seen.
upper posterolateral margin
of abdominal segment 5 has no spines, as seen in this dorsal
Anterior is to the right, and segment 6 is to the left.
segment 6 has a dorsal
but no median
ridge. Anterior is to the right and the tailfan is to the
ventral sides of abdominal
segments 5 (right) and 6 (left) are both smooth and clear, with no median
This view is an oblique view of the right pleura
and the ventral side from the right side of the shrimp. The
of leg 5 can be seen at the right.
The feathery exopods
of the pleopods
are typically held out to the side. They are used for
likely also for burrowing.
carrying a large batch of white
Authors and Editors of Page:
Dave Cowles (2008): Created original page
CSS coding for page developed by Jonathan Cowles (2007)