Scallops are the family Pectinidae of bivalve molluscs. Like the true oysters (family Ostreidae), they have a central adductor muscle, and thus their shells have a characteristic central scar marking its point of attachment. However, the adductor muscle of scallops is larger and more developed than that of oysters because they are active swimmers and the sole migratory bivalve. Their shell shape tends to be highly regular and like the standard image of a shell.
Scallops may be attached to a substrate by a structure called a byssus, or cemented to their substrate (eg. Hinnites spp.). They can also be free living. A scallop can swim by rapidly opening and closing its shell. This method of rapidly opening and closing its shell is also a defense technique, protecting it from any threats.
Life cycle
Scallops are
hermaphroditic; capable of switching sexes. Both sexes produce
roe, whose coloring depends upon the parent's (current) gender. Red roe is that of a female, and white, that of a male. Spermatazoa and ova are released freely into the water during mating season and fertilized ova sink to the bottom. After several weeks, the immature scallop hatches and the larvae drift until settling to the bottom again to grow. They reach sexual maturity after several years, though they may not reach a commercially harvestable size until six to eight years of age. Scallop may live to be as old as 18 years of age, with their age reflected in the
annuli, the concentric rings of their shells. Scallops migrate in large schools throughout the year.
Scallops in cooking
Scallops are a popular type of
shellfish in both Eastern and Western
cooking. They are characterised by having two types of meat in one shell: the scallop (white, meaty) and its coral which is red or white and soft, which is its
roe.
Scallops are commonly sautéd in butter, or else breaded and deep fried. Scallops are commonly paired with light semi-dry white wines. Generally speaking in the US, when a scallop is prepared, only the adductor muscle is used; the other parts of the scallop surrounding the muscle are ordinarily discarded. Most commonly, markets in the US sell scallops already prepared in the shell, with only the adductor muscle intact. Outside the US, the scallop is often sold whole.
Scallops that are frozen without any additives are called "dry packed" while scallops that are treated with sodium tripolyphosphate (STP) are called "wet packed." STP causes the scallops to absorb moisture prior to the freezing process thereby getting a better price per kilogram. Typicallly smaller "bay" scallops are wet packed while larger "Sea", "diver", or "Day boat" scallops are not treated.
In continental cuisine, scallops are often prepared in the form of a quiche or cooked and then set into a savory custard. In Japanese cuisine, scallops may be served in soup or prepared as sashimi or sushi. Dried scallop is known in Oriental cuisine as conpoy.
In the sushi bar "Hotetagai" is the traditional scallop on rice while "Kaibashira" may be called scallops it is actually the adductor muscle of any kind of shellfish e.g. mussels, oysters, or clams.
Scallops in art and design
The Scallop shell as a religious symbol
The French name for a dish containing scallops is
coquille St. Jacques, the Dutch name is
Jakobsschelp and it is so called because the scallop shell is the traditional emblem of
Saint James the Great. The association can most likely be traced to the legend that St. James once rescued a knight covered in scallops. An alternate version of the legend holds that while St. James's remains were being transported to Spain from Jerusalem, the horse of a knight fell into the water, and emerged covered in scallops. Medieval
Christians making the
pilgrimage, known as the
Way of St James, to his shrine at
Santiago de Compostela often wore a scallop shell symbol on their hats or clothes. This fact is reflected in the
Swedish word for scallop, which literally translates to
pilgrim mussel.
The scallop shell symbol found its way into heraldry as a badge of those who had been on the pilgrimage to Compostela. Winston Churchill's family coat of arms includes a scallop, as does John Wesley's (and as a result the scallop shell is used as an emblem of Methodism).
The Scallop shell as a corporate logo
The
mulitnational oil company
Royal Dutch Shell uses a red and yellow scallop shell emblem as its
logo.
Scalloping
Scalloped edges or
ridges refers to a wavy pattern reminiscent of the edge of a scallop's shell.
Gathering scallops
Scallops were traditionally caught by dragging the seabed, but now in British seas there is a trade in
scuba diving to catch scallops. Dived scallops tend to fetch better prices than dredged scallops because their shells are not damaged as much and there is much less rubbish mixed with the catch.
List of genera
- Aequipecten
- Amusium
- Anguipecten
- Annachlamys
- Argopecten
- Bathypecten
- Bractechlamys
- Catillopecten
- Chlamys
- Coralichlamys
- Cryptopecten
- Decatopecten
- Delectopecten
- Equichlamys
- Euvola
- Excellichlamys
- Flexopecten
- Glorichlamys
- Gloripallium
- Haumea
- Hyalopecten
- Juxtamusium
- Lissopecten
- Mesopeplum
- Mimachlamys
- Minnivola
- Mirapecten
- Nodipecten
- Notochlamys
- Patinopecten
- Pecten
- Pedum
- Pseudohinnites
- Semipallium
- Serratovola
- Sinepecten
- Somalipecten
- Veprichlamys
- Volachlamys
External links
Bivalves | Edible molluscs
Kammmuscheln | Vieira | Pectinidae | Šukutės | Kamskjell