''Pinctada maxima'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

pearl oyster ''Pinctada'' is a genus of saltwater oysters, marine bivalve mollusks in the family Pteriidae. These pearl oysters have a strong inner shell layer composed of nacre, also known as "mother of pearl". Pearl oysters are not closely related to ...

, a marine

bivalve Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed b ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

in the family

Pteriidae Pteriidae, also called the feather oysters, is a family (biology), family of medium-sized to large saltwater oysters. They are pearl oysters, Marine (ocean), marine bivalve mollusks in the order Pteriida. Some of the species in this family are i ...

, the pearl oysters. There are two different color varieties: the Gold-lipped oyster and the Silver-lipped oyster. These bivalves are the largest pearl oysters in the world. They have a very strong inner shell layer composed of

nacre Nacre ( , ), also known as mother-of-pearl, is an organicinorganic composite material produced by some molluscs as an inner shell layer. It is also the material of which pearls are composed. It is strong, resilient, and iridescent. Nacre is ...

, also known as "mother of pearl" and are important to the cultured pearl industry as they are cultivated to produce South Sea pearls. The South Sea pearl or Philippine pearl was declared by

Philippine President The president of the Philippines (, sometimes referred to as ) is the head of state, head of government and chief executive of the Philippines. The president leads the executive branch of the Philippine government and is the commander-in- ...

Fidel Ramos Fidel Valdez Ramos (; March 18, 1928 – July 31, 2022), popularly known as FVR, was a Filipino general and politician who served as the 12th president of the Philippines from 1992 to 1998. He was the only career military officer to reached ...

as the national gem in 1996 through Proclamation No. 905. The oyster and pearl are depicted on the reverse side of the Philippine New Generation Currency Series 1,000-peso bill.

Description

Pinctada maxima - Osaka Museum of Natural History - DSC07847

''Pinctada maxima'' oysters grow very large, up to in diameter. The two color varieties have different coloration in the outer edge of the interior. This mother of pearl or nacre is responsible for the color of the pearls that the oyster can produce. Water temperature, plankton and sediments determine which color variety is more common in a given area.

Pearl farming (Perliculture)

''Pinctada maxima'' produces South Sea pearls in colors ranging from white, silver, champagne, gold. ''

Pinctada margaritifera ''Pinctada margaritifera'', commonly known as the black-lip pearl oyster, is a species of pearl oyster, a saltwater mollusk, a marine bivalve mollusk in the family Pteriidae. This species is common in the Indo-Pacific within tropical coral ree ...

'' produces South Sea pearls commonly referred to as Tahitian pearls or black pearls which in fact come in color hues including gray, platinum, charcoal, aubergine, and peacock. Currently south sea pearls are cultured primarily in Australia, Indonesia, Tahiti and now, the Philippines. Because these pearl oysters are so large, a much larger nucleus than usual can be used in culturing. Sea pearls farmed in the Philippines, typically produce golden pearls from the gold-lipped pearl oyster, which are currently experiencing a surge in popularity, resulting in increased market-demand, particularly in China. Commercial pearl farming in Australia is mostly centered around the coastal waters of Broome, located in the Kimberley region of

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

. Best known and valued for their white/silver with pink hues from the silver-lipped pearl oyster, Australian South Sea Pearls can grow beyond 18mm – 20mm in diameter, with a typical size of 10mm – 13mm when harvested following a two-year gestation. The Tahitian or black pearl comes from the black-lipped pearl oyster, produced from the waters surrounding

Tahiti Tahiti (; Tahitian language, Tahitian , ; ) is the largest island of the Windward Islands (Society Islands), Windward group of the Society Islands in French Polynesia, an overseas collectivity of France. It is located in the central part of t ...

and the French Polynesian archipelago.

Culinary use

Pearl meat is the adductor muscle of the ''Pinctada maxima'' pearl oyster. Wild caught Australian pearl meat is MSC certified, recognising this delicacy as a sustainable seafood which can be traced to an environmentally sustainable source. In recent years, Australian pearl meat has been adopted by some of the world's leading western chefs as an exclusive, rare ingredient, with a mere six tons sourced annually. A translucent, scallop-sized medallion, pearl meat is sweet and firm. Described as a cross between calamari and lobster in taste, the flavor profile varies significantly depending on preparation. Prized as a delicacy in Asia for centuries and highly regarded for its medicinal properties, pearl meat is an excellent source of Omega 3. It is high in protein and contains no trans-fats. It also contains

vitamin A Vitamin A is a fat-soluble vitamin that is an essential nutrient. The term "vitamin A" encompasses a group of chemically related organic compounds that includes retinol, retinyl esters, and several provitamin (precursor) carotenoids, most not ...

and

vitamin E Vitamin E is a group of eight compounds related in molecular structure that includes four tocopherols and four tocotrienols. The tocopherols function as fat-soluble antioxidants which may help protect cell membranes from reactive oxygen speci ...

, as well as

calcium Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to it ...

iron Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...

zinc Zinc is a chemical element; it has symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic tabl ...

, and

iodine Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at , and boils to a vi ...

References

External links

{{Authority control Pteriidae Bivalves described in 1901 Molluscs of the Philippines Bivalves of Australia Fauna of Indonesia Fauna of Fiji National symbols of the Philippines