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Pinctada radiata
''Pinctada radiata'', commonly known as the Atlantic pearl-oyster or the Gulf pearl oyster〔(【引用サイトリンク】url=http://www.europe-aliens.org/pdf/Pinctada_radiata.pdf )〕 is a species of pearl oyster distributed throughout the Indo-Pacific.〔(【引用サイトリンク】url=http://www.ciesm.org/atlas/Pinctadaradiata.html )〕 Its range extends as far north as Japan and as far south as the Australian state of Victoria.〔
==Description==
''P. radiata'' is generally between in length, though it can reach . The shell is, thin, compressed, and square-like,〔 with growth rings and ribs on the top surface.〔 Its colouration varies, though it usually displays a brown or red exterior with a pearly interior and a light brown edge.〔 More rarely, the shell may display a green or bronze exterior. Darker brown or red rays may mark the shell, creating darker areas at the margin.〔 The shell's shape and structure also show much variation, hence its many synonyms; it has been described as "very similar to ''Pinctada margaritifera''", and has been misidentified on occasion as ''P. margaritifera''. ''P. radiata'' is hermaphroditic, with reproductive maturity being influenced by temperature.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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