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Clam. Clam is a common name for several kinds of bivalve mollusc. The word is often applied only to those that are edible and live as infauna, spending most of their lives halfway buried in the sand of the sea floor or riverbeds. Clams have two shells of equal size connected by two adductor muscles and have a powerful burrowing foot. [1]
Pholads are unusual bivalves capable of boring into various kinds of rock, firm clay and peat, and they live permanently in the burrows they create. These clams use a set of ridges or "teeth" on the outer anterior surfaces of their shells to grind into suitable substrate, creating a non-branching burrow. Pholad burrows are typically narrower at ...
Geoduck. The Pacific geoduck (/ ˈɡuːiˌdʌk / GOO-ee-duk; Panopea generosa) is a species of very large saltwater clam in the family Hiatellidae. [1][2] The common name is derived from the Lushootseed name, gʷidəq. The geoduck is native to the coastal waters of the eastern North Pacific Ocean from Alaska to Baja California. [2]
Razor shells can dig themselves into the sand with great speed to escape predation. When a Pacific razor clam (Siliqua patula) is laid on the surface of the beach, it can bury itself completely in seven seconds [90] and the Atlantic jackknife clam, Ensis directus, can do the same within fifteen seconds. [91]
An average adult shipworm measures 4 to 6 inches (10 to 15 cm) in length and less than one-quarter inch (6.4 mm) in diameter, but some species grow to considerable size. [2] The body is cylindrical, slender, naked, and superficially vermiform (worm-shaped). In spite of their slender, worm-like forms, shipworms possess the characteristic ...
Teredo navalis has an elongated, reddish, wormlike body which is completely enclosed in a tunnel it has made in floating or submerged timber. At the front end of the animal are two triangular, calcareous plates. These are up to 2 cm ( in) long and correspond to the valves of other bivalve molluscs. They are white, with a covering of pale brown ...
Burrow. A burrow is a hole or tunnel excavated into the ground by an animal to construct a space suitable for habitation or temporary refuge, or as a byproduct of locomotion. Burrows provide a form of shelter against predation and exposure to the elements, and can be found in nearly every biome and among various biological interactions.
Atlantic surf clam. A 15 cm adult shell of Spisula solidissima from Long Beach, Long Island. Right valve at the top, left valve at the bottom. The Atlantic surf clam (Spisula solidissima), also called the bar clam, hen clam, skimmer or simply sea clam, is a very large, edible, saltwater clam or marine bivalve mollusk in the family Mactridae.
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