Soft-shell clam

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Soft-shell clam or Sand Gaper
Temporal range: Oligocene–Present
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Myida
Superfamily:
Myoidea
Family: Myidae
Genus: Mya
Species:
M. arenaria
Binomial name
Mya arenaria

Soft-shell clams (American English) or Sand gaper (British English/Europe),

mollusk in the family Myidae
.

Habitat and distribution

These clams live buried in the sediment on tidal flats. While they are common in muddy areas, their name "arenaria" means sandy and they prefer a combination of sandy and muddy areas. They are well known as a food item on the coast of New England in the Western Atlantic Ocean; however, the range extends much farther north to Canada and south to the Southern states. They are also found in the Eastern Atlantic Ocean, for example in the UK, as well as in the North Sea's Wadden Sea (where they are the dominant large clam).

This species has become

Pacific Coast of North America, including Alaska, Canada and the continental United States.[1] However M. arenaria originated in the Pacific Ocean during the Miocene. It extended its range in the early Pliocene to the Atlantic, including European waters. The Pacific and European populations became extinct some time in the early Pleistocene, leaving only the Northwest Atlantic population, which subsequently spread via humans to its current distribution.[2][3] It also occurs in the Mediterranean Sea.[4]

Physiology

Mya arenaria has a

quahog
).

This clam is found living approximately 3–8 in (7.6–20.3 cm) under the surface of the mud. It extends its paired

siphons up to the surface; these draw in seawater, filter it for food, and expel it. The holes in the mud through which the water is drawn in and out can often be seen at low tide. Water may be visibly ejected from the siphon tips when pressure is applied to the surrounding mud. This makes the clams easier to locate when humans are clam digging
.

Predators

Moss Landing, California
, eating what appear to be Mya arenaria

As well as being eaten by humans, the soft-shelled clam is relished by

northern moon snails and invasive green crabs
. They are also a favorite of sea gulls, which pull the clam from the sand, climb to about 15–20 ft (5–6 m), and then drop the clam on a hard surface, breaking the shell. They then dive down quickly to eat the soft parts of the clam before others can get to it.

Cooking

Soft-shell clams are edible and can be used in a variety of dishes. Before cooking, it is generally recommended that clams be stored in saltwater for a few hours to facilitate the expulsion of sand from their digestive tracts. Some recommend that cornmeal be added to the water to give the clams something to filter from it.

Soft-shell clams can be eaten steamed,

clam broth in which they were cooked, to rinse away remaining sand, and then very briefly in melted butter
.

References

  1. doi:10.1016/j.seares.2005.10.004
  2. doi:10.1007/BF02908905
  3. S2CID 4358254
  4. ^ Crocetta & Turolla (2011), "Mya arenaria Linné, 1758 (Mollusca: Bivalvia) in the Mediterranean: its distribution revisited", Journal of Biological Research, vol. 16, pp. 188–193

Scientific literature

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