Ostrea gigas

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Noun1.Ostrea gigas - a large oyster native to Japan and introduced along the Pacific coast of the United States; a candidate for introduction in Chesapeake Bay
oyster - marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters
genus Ostrea, Ostrea - type genus of the family Ostreidae
References in periodicals archive ?
The immigrant oyster (Ostrea gigas): now known as the Pacific oyster.
The oyster Crassostrea sikamea was first identified in Ariake Bay, Kumamoto Prefecture, Japan, by Amemiya (1928) as a variety of the Japanese or Pacific oyster, Ostrea gigas vat.