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Mantle of giant clam with light-sensitive spots, which detect danger and cause the clam to close. Tridacna gigas, the giant clam, is the best-known species of the giant clam genus Tridacna. Giant clams are the largest living bivalve molluscs. Several other species of "giant clam" in the genus Tridacna are often misidentified as Tridacna gigas.
In the United States, razor clam harvesting is typically authorized by state officials several times a year. [7] Harvesters locate the clam by looking for a "show," which can present as either a hole or depression in the sand. [8] Some clams expose their siphons as the surf is receding making them far easier to spot; this behavior is called ...
The razor shell has been known to reach 23 centimetres (9 in) [4] in length. The dorsal margin is straight while the ventral margin is curved. It can easily be confused with the slightly shorter 15 centimetres (6 in) and more curved E. ensis (in which both front and back are curved in parallel). Razor shells have a fragile shell, with open ends.
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This subfamily contains the largest living bivalve species, including Tridacna gigas, the giant clam. They have heavy shells, fluted with 4–6 folds. They have heavy shells, fluted with 4–6 folds. The mantle is usually brightly colored.
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 "shaft" or siphons alone can be 1 metre (3 ft 3 in) in length. The geoduck is the largest burrowing clam in the world. [3]
The creature in the video is a Pacific razor clam, though it looks enough like a geoduck to befuddle even a knowledgeable biologist: Digging into wet sand is a survival technique for the critter ...
Sinonovacula constricta, the constricted tagelus, Chinese razor clam or Agemaki clam, is a commercially important species of bivalve native to the estuaries and mudflats of China and Japan. It is extensively aquafarmed in China and other countries, with 742,084 tons worth US$667,876,000 harvested in 2008. [3] Salt-baked Duotou clams, a famous ...