As with other pandalids,
the pereopods have no exopodites.
The first pereopod is not chelate. The carpus
2 is subdivided into many (more than 7) units (multiarticulated) (photo).
is prominent and has movable dorsal spines. Pandalus
has a first antenna only slightly longer than the carapace
(characteristic of genus Pandalus).
arches near the eyes, the distal end curves upward, and the tip is bifid.
Dorsal spines are found all along the rostrum,
including on the distal half. All but the most distal dorsal
spines are movable. The body is slender and
segment 3 has a median dorsal ridge with a spine definitely anterior to
the posterior margin of the segment and another spine at the posterior
segment 4 also has a mid-dorsal spine on the posterior margin (photo).
is narrow, tapers to a blunt tip, and has 6-10 pairs of dorsolateral
are usually slightly shorter than the telson.
The color is a translucent pinkish hue with darker regions largely
by numerous fine red dots over the entire body. The red dots
especially concentrated on the dorsal surface and ventral margin of the
the distal part of the rostrum,
and the dorsal abdomen especially on segments 3-6. Total
Males to 12 cm, females to 15 cm.
Pandalus eous Makarov, 1935
Common name(s): Alaska pink shrimp,
Pink shrimp, Northern
shrimp, Deep sea prawn
Pandalus borealis, Pandalus
|Pandalus eous, about 14 cm total
length, from a 100 m depth
benthic trawl in San Juan Channel, WA
|(Photo by: Dave Cowles,
Note: This shrimp is extremely similar to Pandalus
which is found in the North Atlantic ocean and round
is continuing on whether it is in fact P. borealis,
(P. borealis eous), or the separate species P.
How to Distinguish from
Similar Species: Pandalus
jordani has similar coloration and morphology but has at most
posterodorsal margin on abdominal segment 3 (but no posterodorsal
and no posterodorsal spine on segment 4. Most other pandalids
as P. danae
do not have dorsal
spines that continue out onto the distal half of the rostrum,
plus have more striped coloration. P.
platyceros has dorsal spines on the distal half of
but has white stripes on the carapace
and white spots on the abdomen.
In the Pacific,
from the Sea of Japan and Korea to the Columbia River. The
species, P. borealis, is found In the Atlantic from
Maine to Scandinavia
and around Greenland
m depth. Common in this area from 50-90 m depths
Soft bottoms (may migrate
upward at night)
History: Diet is largely
small crustaceans. Pandalids capture their prey by trapping
their legs. Predators include dogfish, Pacific cod, hake, and
Parasites include the isopod Bopyroides hippolytes
and the rhizocephalan
barnacle Sylon hippolytes. This species
is a protandric hermaphrodite.
Larvae hatch in March and April and remain pelagic for 6 instars before
settling to the bottom. Become sexually mature at about 18
at a carapace length of 1.6 cm. At that time there is about a
ratio of males to females (if few females are present in the
more males turn to females sooner). Breed in
Females carry eggs through the winter (average about 1600-2100
In their second spring most males turn into females. By 30
all individuals are females and average just over 2 cm carapace
Live about 3-4 years. Has been an important commercially
shrimp in British Columbia and Alaska.
1987, 1996 (improperly keyed in 1987 version)
and O'Clair, 1998
Komai, T., 1999. A revision of the genus Pandalus (Crustacea:
Decapoda: Caridea: Pandalidae). Journal of Natural History
A related reference: Viker, Susanne, Asa Noren
Per Sundberg, 2006. The complete mitochondrial DNA sequence
northern shrimp, Pandalus borealis. J.
General Notes and
Observations: Locations, abundances,
A profile of abdominal segment 3 shows the spines present near the
middle and the posterior end of the middorsal line
The fourth abdominal segment also has a spine present at the posterior
end of the middorsal line.
This view of the left antennal scale, which is longer than the telson
shows that the antennal lamella is slightly longer than the spine.
Just above the scale the endopodite of the second antenna, which
of several segments then a flexible whiplike "flagellum" composed of
small segments and being about as long as the animal's body.
The antennal scale is the exopodite of the second antenna.
As with all Pandalids, the carpus of the second leg is
has many ringlike striations in it that allow it to bend.
Most Pandalids that I have observed hold this second leg up next to
the body and it is hard to get a clear view of it in a living
The telson has a double row of 6-10 spines along the dorsal
This is an oblique view of the telson from the right side, with the
The left uropods, which are slightly shorter than the telson, are
behind the telson.
This gravid female was collected at 375 m depth in the Okhotsk
sea, near the southwestern shore of Kamchatka on April 12, 2008.
Photo by Andrey Gontchar of VNIRO
Dorsal view of the same shrimp. Photo by Andrey
Authors and Editors of Page:
Dave Cowles (2006): Created original page