īetween 19, the scientific name of this clam was confused with that of an extinct clam, Panopea abrupta (Conrad, 1849), in scientific literature. It is sometimes known as a mud duck, king clam or, when translated literally from Chinese, an elephant-trunk clam ( Chinese: 象拔蚌 pinyin: xiàngbábàng Jyutping: zoeng6 bat6 pong). The name geoduck is derived from a Lushootseed ( Nisqually) word gʷídəq either a word composed of a first element of unknown meaning and əq meaning "genitals" (referring to the shape of the clam), or a phrase meaning "dig deep", or perhaps both, as a double entendre. Geoduck for sale at Tsukiji fish market in Tokyo These annual rings also serve as an archive of past marine variability. The precise longevity of geoducks can be determined from annual rings deposited in the shell which can be assigned to calendar years of formation through crossdating. It is also one of the longest-living animals of any type, with a typical lifespan of 140 years the oldest has been recorded at 179 years old. The geoduck is the largest burrowing clam in the world. The shell of the clam ranges from 15 centimetres (6 in) to over 20 centimetres (8 in) in length, but the extremely long siphons make the clam itself much longer than this: the "neck" or siphons alone can be 1 metre (3 ft 3 in) in length. The geoduck is native to the coastal waters of the eastern North Pacific Ocean from Alaska to Baja California. The common name is derived from the Lushootseed ( Nisqually) word gʷídəq. The Pacific geoduck (“gooey-duck” / ˈ ɡ uː i ˌ d ʌ k/ Panopea generosa) is a species of very large saltwater clam in the family Hiatellidae.
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