It is one of the most closely regulated fisheries in both countries. The geoduck's high market value has created an $80-million industry, with harvesting occurring in the US states of Alaska, Washington, and Oregon and the Canadian province of British Columbia. As of 2011, these clams sell in China for over US$33 per kilogram or $15 per pound. The world's first geoduck fishery was created in 1970, but demand for the half-forgotten clam was low at first due to its texture. This estimate is used to predict the two percent allowed for commercial harvesting. Д«iomass densities in Southeast Alaska are estimated by divers, then inflated by twenty percent to account for geoducks not visible at the time of survey. In the Puget Sound, studies indicate that the recovery time for a harvested tract is 39 years. However, due to a low rate of recruitment and a high rate of mortality for geoduck eggs, larvae, and post-settled juveniles, populations are slow to rebound. A female geoduck produces about 5 billion eggs in her century-long lifespan. In Alaska, sea otters and dogfish have proved capable of dislodging geoducks starfish also attack and feed on the exposed geoduck siphon. Adult geoducks have few natural predators, which may also contribute to their longevity. A geoduck sucks water containing plankton down through its long siphon, filters this for food and ejects its refuse out through a separate hole in the siphon. The oldest recorded specimen was 168 years old, but individuals usually live up to 140 years. Research to date does indicate their presence. Whether these microsporidium-like parasitic species were introduced by commercial farming is being studied by Sea Grant. There is a growing concern over the increase of parasites in the Puget Sound population of geoduck. The largest quantities have come from Golden Bay in the South Island where 100 tonnes were harvested in one year. ДЄ related species, Panopea zelandica, is found in New Zealand and has been harvested commercially since 1989.

Native to the west coast of Canada and the northwest coast of the United States (primarily Washington and British Columbia), these marine bivalve mollusks are the largest burrowing clams in the world, weighing in at an average of 0.7 kilograms ( 1 + 1вЃ„ 2В lb) at maturity, but specimens weighing over 7 kilograms (15В lb) and as much as 2 metres (6В ft 7В in) in length are not unheard of. Д«etween 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: и±Ўж‹”иљЊ pinyin: xiГ ngbГЎbГ ng Jyutping: zoeng6 bat6 pong). The name geoduck is derived from a Lushootseed ( Nisqually) word gК·ГdЙ™q either a word composed of a first element of unknown meaning and Й™q 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

Giant geo duck mukbang