Crustaceans
(Phylum Arthropoda, Subphylum Crustacea)

Instructions: For a larger view of the specimens below, click on an image. The enlarged image will appear on your screen in a new window. Close this new window when you are through viewing it. See note below regarding identification of macros. Further information on the identification and ecology of aquatic macroinvertebrates can be found from the materials mentioned on the Macro Resources Page.

Back to: Freshwater Macros Index

Crustacean Classes:
Aquatic Sow Bug | Scud | Water Flea | Crayfish


Aquatic Sow Bug (Order Isopoda)
Tolerance: tolerant

9.jpg
9.jpg
genus: Caecidotea
drainage ditch
Battle Ground, WA

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10.jpg
genus: Caecidotea
drainage ditch
Battle Ground, WA

Harmony Dr. macro
harmony-120.jpg
terrestrial/semi-aquatic?
Harmony Dr.
Longview, WA
July 2006

15.jpg


Todd Rd. pond
Cowlitz Co., WA
Spring 2010

Scud/Sideswimmer (Order Amphipoda)
Tolerance: tolerant
188.jpg
188.jpg
Kress Lake
Kalama, WA

macro - 54
IMG_3367.jpg
scud
Willow Grove Park
Cowlitz Co.
Columbia River
July 2007

macro - 54
IMG_3394.jpg
scud
Willow Grove Park
Cowlitz Co.
Columbia River
July 2007

Water Flea (Order Cladocera)

tlp5-11-05_101.jpg
tlp5-11-05_101.jpg
(3 mm)
pond
Tiger Lily neighborhood
Spring 2005

tlp5-11-05_102.jpg
tlp5-11-05_102.jpg
(3 mm)
pond
Tiger Lily neighborhood
Spring 2005


Crayfish (Order Decapoda)
Tolerance: moderate

11.jpg
11.jpg
(5 cm)
Salmon Creek
near Hockinson, WA

crayfish
up_efl_71.jpg
(10 mm)
East Fork Lewis River
upper watershed
Fall 2005

 

 

crayfish
efl_f06_P1020403.jpg

East Fork Lewis River
Lewisville Park
Sep. 28, 2006

crayfish.jpg
efl_f06_P1020413.jpg

East Fork Lewis River
Lewisville Park
Sep. 28, 2006

crayfish.jpg
jen_cr_06_1634.jpg

Jenny Cr.
LaCenter, WA
August 2006

crayfish.jpg
jen_cr_06_1635.jpg

Jenny Cr.
LaCenter, WA
August 2006

crayfish.jpg
efl_spr05/crayfish.jpg

East Fork Lewis River
Spring 2005

crayfish2.jpg
efl_spr05/crayfish2.jpg

East Fork Lewis River
Spring 2005

crayfish3.jpg
efl_spr05/crayfish3.jpg
crayfish with
branchiobdellid worms

East Fork Lewis River
Spring 2005

 


Note from author: Considerable effort has been made to be as accurate as possible in the identification of the organisms. While I am fairly confident of the ID (at least for the major taxon levels), I cannot guarantee complete accuracy. In particular, you will notice that some organisms are labeled with a (*). This indicates a probable classification based on general traits (shape, size and color) of the organism and location from which it was found. I do not possess the level of expertise nor did I conduct the kind of detailed inspection to provide a conclusive ID -- consider these efforts at classification as my "best guess" based on available information and, in some instance, outside assistance. (If you notice any errors or omissions, please contact me at the email address provided at the bottom of this page.)

Back to: Freshwater Macros Index


modified: June 2010