It's the ever-lovely geoduck
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Geoduck
Common name: Geoduck
Scientific name: Panopea abrupta
Size: They grow to about 2 pounds in 4 or 5 years and reach full size in about 15 years (shell size about 6 inches, weight 10 to 14 pounds).
Distinctive features: the shell covers only a small portion of the geoduck's portly body or "siphon"
Diet: algae
Life expectancy: up to 150 years!
Distribution: coastal waters from California to Alaska and are most prolific in Puget Sound and British Columbia
Where it lives: Young clams burrow into sediments about a foot each year and generally settle in at about 3 feet. They live in low intertidal and subtidal zones at depths of 10 to 80 feet typically, but reaching depths up to 360 feet. Densities can surpass 20 clams per square meter in ideal habitats.
Many thanks to Dr. Megan Dethier's Spring 2002 Invertebrates Class at the UW's Friday Harbor Labs for researching information on many of the invertebrates featured on this site.
Photo courtesy of Dan Cheney.