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Crassostrea sikamea
Image courtesy of Linda Schroeder, Pacific Northwest Shell Club,
Crassostrea sikamea
Taxonomic Group: Mollusks-Bivalves


Crassostrea sikamea is commonly known as the Kumamoto Oyster. It was previously considered a subspecies of the Pacific Oyster (C. gigas), and although the two can hybridize, it is now considered its own species. Its native range extends through Japan, Korea, Taiwan and southern China. It is cultured on the West Coast of North America, but there is no evidence that it is established and reproducing in the wild. It has also been cultured in France, Brazil, and Tasmania, but neither introduction resulted in reproduction or successful commercial culture.

*This species is not currently established in North American waters.

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Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT (2018)
National Exotic Marine and Estuarine Species Information System.
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Marine Invasions Lab
Smithsonian Environmental Research Center

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