Smooth clam

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Smooth clam

Scientific classification

Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Veneroida
Family:	Veneridae
Genus:	Callista
Species:	C. chione

Binomial name

Callista chione
(Linnaeus), 1758

The smooth clam, Callista chione, (also sometimes classified as Cytherea chione or Meretrix chione) is a rather large, temperate, marine, bivalve mollusc that inhabits sandy bottoms or with small pebbles in clean waters down to about 200 m from the British Isles to the Mediterranean.^[1] The shell can reach up to about 110 mm Ø, its outer side is smooth and ranges from light greenish creamy colour to medium brown ^[2], probably varies to match the background; the interior is white to soft pink. The concentric and radial growth lines are easily seen. Cytherea chione is edible, different dishes are prepared throughout the Mediterranean in Spain, Italy, France, the Balkan and the Magreb countries.

It has been found that, as is the case with many bivalve molluscs, which are filter-feeders, (they feed by filtering food particles from the water), that Cytherea chione, common in fish markets in the Mediterranean, concentrates toxins from dinoflagellates blooms associated with pollution events red tides ^[3] (sewage waters, old sediment dredging, ship ballast water dumping, etc.) which cannot be eliminated by the traditional cleansing of shellfish in clean water or by cooking, and which are responsible for complex human health problems: respiratory ailments, skin rashes, even paralysis, etc., such as it is known now to have occurred in New Orleans, associated with the contact or ingestion of severely contaminated water, left by Katrina. The commonest is known as PSP or paralytic shellfish poisoning.

[edit] Vernacular names

En: Smooth or brown Venus-clam
Fr: Vermi, grande palourde
It: Cappa liscia, cappa chione, issolone, venerechione
De: Braun Venusmuschel
Es: Almejón de sangre, mariposa, almejón brillante, gavesia
Ca: Petxinot de sang, lluenta