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Geoduck: Difference between revisions
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[[File:Geoduck.jpg|thumb|150px|left|The Geoduck or Giant Clam of the Pacific]] | [[File:Geoduck.jpg|thumb|150px|left|The Geoduck or Giant Clam of the Pacific]] | ||
A geoduck is a large species of [[bivalve]] [[clam]]. It has a rectangular shell that can be up to | A geoduck is a large species of [[bivalve]] [[clam]]. It has a rectangular shell that can be up to nine or ten inches long and five inches high. Each of the [[valves]] are equal in size and have irregularly shaped lines that indicate growth. The geoduck’s [[ligament hinge]] connects and holds the two valves together. The shell is covered by a thin covering called the [[periostracum]]. The periostracum protects the valve's middle layer from scratches and abrasions<ref name=mlife>[http://wikis.evergreen.edu/marinelife1011/index.php/Panopea_generosa#cite_note-2 Ever-green] ''marine-life-1011''. Web. March 7, 2011(Date-of-publication).</ref>. The geoduck is best known for its large siphon. The siphon itself may grow to over three feet in length. Inside the [[siphon]] there are two tubes: the [[inhalant]] and the [[exhalent tubes]]. The geoduck takes in water with its inhalant tube and expels waste through it exhalent tube. Like all clams the geoduck has a [[foot]]. It uses its foot to burrow into the ground where it then lives for the rest of its life<ref name=mlife>[http://wikis.evergreen.edu/marinelife1011/index.php/Panopea_generosa#cite_note-2 Ever-green] ''marine-life-1011''. Web. March 7, 2011(Date-of-publication).</ref>. | ||
== Life Cycle == | == Life Cycle == | ||
