For verb senses, see Scalloping. For potato scallops, see Potato cake. For scalloped potatoes, see Gratin § Potatoes gratiné. For the cut of meat, see Escalope. For the scallop shell moth, see Rheumaptera undulata.
Not to be confused with Scallion.
Scallop
Temporal range: Middle Triassic-present 247–0 Ma
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Argopecten irradians, the Atlantic bay scallop
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Bivalvia
Order:
Pectinida
Superfamily:
Pectinoidea
Family:
Pectinidae Wilkes, 1810
Genera
See text
Synonyms
Pectenidae
Scallop (/ˈskɒləp,ˈskæləp/)[a] is a common name that encompasses various species of marine bivalve mollusks in the taxonomic family Pectinidae, the scallops. However, the common name "scallop" is also sometimes applied to species in other closely related families within the superfamily Pectinoidea, which also includes the thorny oysters.
Scallops are a cosmopolitan family of bivalves found in all of the world's oceans, although never in fresh water. They are one of the very few groups of bivalves to be primarily "free-living", with many species capable of rapidly swimming short distances and even migrating some distance across the ocean floor. A small minority of scallop species live cemented to rocky substrates as adults, while others attach themselves to stationary or rooted objects such as seagrass at some point in their lives by means of a filament they secrete called a byssal thread. The majority of species, however, live recumbent on sandy substrates, and when they sense the presence of a predator such as a starfish, they may attempt to escape by swimming swiftly but erratically through the water using jet propulsion created by repeatedly clapping their shells together. Scallops have a well-developed nervous system, and unlike most other bivalves all scallops have a ring of numerous simple eyes situated around the edge of their mantles.
Many species of scallops are highly prized as a food source, and some are farmed as aquaculture. The word "scallop" is also applied to the meat of these bivalves, the adductor muscle, that is sold as seafood. The brightly coloured, symmetric, fan-shaped shells of scallops with their radiating and often fluted ornamentation are valued by shell collectors, and have been used since ancient times as motifs in art, architecture, and design.
Owing to their widespread distribution, scallop shells are a common sight on beaches and are often brightly coloured, making them a popular object to collect among beachcombers and vacationers.[2] The shells also have a significant place in popular culture.
^Whitney, D.W. (1890) Scallop The Century Dictionary: An Encyclopedic Lexicon of the English Language p.5371, Century Company, and (2009) The Oxford English Dictionary, Second Edition, Oxford University.
^Robinson & Robinson 2000, p. 65.
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Scallop (/ˈskɒləp, ˈskæləp/) is a common name that encompasses various species of marine bivalve mollusks in the taxonomic family Pectinidae, the scallops...
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