a large edible clam found burrowing deeply in sandy mud along the Pacific coast of North America; weighs up to six pounds; has siphons that can extend to several feet and cannot be withdrawn into the shell
The geoduck (pronounced i.e. "gooey duck"),http://www.bartleby.com/61/21/G0092100.html American Heritage Dictionary Panopea abrupta or Panope generosa, is a species of large saltwater clam, also known as the king clam or elephant trunk clam.