Pacific Oyster (Crassostrea gigas)

Rock oyster, Japanese oyster

Pacific oysters have irregular, fluted shells with rough, layered edges. The outer shell is typically grey, cream, or brown, while the inside is smooth and pearly white. They are generally larger and more elongated than native oysters. The flesh is plump and juicy, with a fresh, briny flavour that varies depending on where they are grown.

Pacific oysters are found in coastal waters, estuaries, and sheltered bays. In Cornwall, they are widely farmed in intertidal zones and on trestles or ropes. Originally introduced to the UK for aquaculture, they have since established wild populations in some areas.

Sustainability Rating

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Status: Pacific oysters are considered a highly sustainable seafood choice due to their low environmental impact and efficient farming methods.


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Best Choice: Farmed Pacific oysters from regulated Cornish fisheries, where water quality and harvesting practices are carefully monitored.


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Avoid: Oysters from polluted waters or sources without proper environmental and food safety controls.

Culinary Uses

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Pacific oysters are most commonly served raw to highlight their fresh, briny taste.

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Can also be grilled, baked, or fried for a richer flavour.

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Often paired with lemon, shallots, or light dressings.

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A popular choice for both casual dining and premium seafood dishes.

Best Fishing Practices

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Farmed using low-impact aquaculture methods such as trestles, ropes, or mesh bags.

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Require no additional feed, relying on natural plankton in the water.

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Regular water quality monitoring ensures both sustainability and food safety.

Seasonality

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Available year-round, as farmed oysters provide a consistent and reliable supply regardless of season.

Supporting Local, Sustainable Seafood

Pacific oysters are one of the most sustainable seafood choices available. By choosing locally farmed oysters from Cornwall, you support environmentally responsible aquaculture, improve water quality, and contribute to the strength of coastal economies.

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