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Largest clam known to man

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The geoduck or gooyduck is the largest species of clams on the face of the earth. The clam grows to around 15 to 20cm but it’s long siphon can reach 1 metere in length. It weighs between 0.5 and 1.5 kilograms but can grow much larger. There have been stories about 7.5 kg heavy gooyducks.The geoduck or gooyduck is the largest species of clams on the face of the earth. The incredible aspect of the gooeyduck isn’t only limited to its size, but also to its lifespan. It has a life expectancy of 146 years, which makes it one of the longest-living organisms in the animal reign.The organism, which can live well over 100 years, geoducks are a delicacy in China and Japa, where they are often eaten raw, sashimi style.

Wikipedia says

The geoduck (“gooey duck”), Panopea generosa, is a species of very large saltwater clam, a marine bivalve mollusk in the family Hiatellidae.

The shell of this clam is large and contains small wings, about 15 centimetres (5.9 in) to over 20 centimetres (7.9 in) in length, but the extremely long siphons make the clam itself very much longer than this: the “neck” or siphons alone can be 1 metre (3.3 ft) in length.

The unusual name of the clam is derived from a Lushootseed (Nisqually) word g?íd?q meaning “dig deep”, and its phonemically counterintuitive spelling is likely the result of poor transcription rather than anything having to do with ducks. Alternate spellings include gweducgweduckgoeduck, and goiduck. It is sometimes known as the king clam, or when translated literally from the Chinese characters ???, the elephant trunk clam.

Between 1983 and 2010, the scientific name of this clam was confused with an extinct clam, Panopea abrupta (Conrad, 1849), in the scientific literature.

Native to the northwest coast of the United States and Canada (primarily Washington and British Columbia), the geoduck is the largest burrowing clam in the world, weighing in at an average of one to three pounds (0.5–1.5 kg) at maturity, but specimensweighing over 15 pounds (7.5 kg) and as much as 2 meters (6 ft) in length are not unheard of.

A related species, Panopea zelandica, is found in New Zealand and has been harvested commercially since 1989. The largest quantities have come from Golden Bay in the South Island where 100 tonnes were harvested in one year.

Geoducks are one of the longest-living organisms in the Animal Kingdom. They have a life expectancy of about 146 years, with the oldest recorded at over 160 years. Scientists speculate that the geoduck’s longevity is the result of low wear and tear. 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. Adult geoducks have few natural predators, which may also contribute to their longevity. In Alaska, sea otters and dogfish have proved capable of dislodging geoducks; starfish also attack and feed on the exposed geoduck siphon.

Geoducks are broadcast spawners. A female geoduck produces about 5 billion eggs in her century-long lifespan—in comparison, a human female produces about 500 viable ova during the course of her life. 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. In the Puget Sound, studies indicate that the recovery time for a harvested tract is 39 years.

Source : Here

Comments (4)


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  2. Mike says:

    The gooyduck is an awesome specimen. But the actual known largest clam is called the Gigas Clam(Tridacna Gigas). They can get up to 4 feet and 400lbs. People in the native islands sometimes use the shells as bath tubs for children.

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