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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 Registry of World Record Size Shells is a conchological work listing the largest (and in some cases smallest) verified shell specimens of various marine molluscan taxa.A successor to the earlier World Size Records of Robert J. L. Wagner and R. Tucker Abbott, it has been published on a semi-regular basis since 1997, changing ownership and publisher a number of times.
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.
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 ...
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Oct. 1—Potentially dangerous levels of domoic acid in razor clams has triggered a closure along the entire Oregon Coast for people digging and keeping these popular shellfish.