The Pacific Oyster

The Pacific oyster is the dominant commercial oyster of the Pacific Northwest and one of the most widely farmed oysters in the world. It is native to the western Pacific and was introduced to the Pacific coast of North America in the twentieth century as the region’s native Olympia oyster industry declined.

Scientific name

The Pacific oyster is commonly listed as Magallana gigas; older literature and much of the seafood trade still use Crassostrea gigas. Both names refer to the same species.

Why Pacific oysters became so important

Pacific oysters grow relatively quickly, tolerate a broad range of estuarine conditions and perform well in aquaculture. Those traits made them a practical foundation for rebuilding oyster production on the West Coast.

What a Pacific oyster looks like

Pacific oysters are cupped oysters with an irregular, fluted shell. Shell form changes with density, bottom conditions, water movement and farming method. Oysters that have room to grow individually can develop a deeper cup and more compact shape.

How they taste

There is no single Pacific-oyster flavor. The species provides the biological template, but salinity, plankton, season, condition and growing area shape the final taste. In Willapa Bay, our Pacific oysters often show clean salinity, mineral and earthy notes, and a sweet cucumber or melon-like finish.

How they grow

Pacific oysters can be produced from hatchery seed or natural set. Young seed may pass through nursery systems before moving into bags, baskets or other grow-out systems. Their growth rate depends strongly on food availability, water temperature, density and site.

Pacific oysters and the native Olympia oyster

Pacific oysters are not native to the Pacific Northwest. The native oyster is the Olympia oyster, Ostrea lurida. The two species differ in size, growth rate, reproductive biology, flavor and ecological history.

Why species is only part of the story

Knowing the species tells you something about an oyster, but not everything. Growing method and place can create substantial differences among oysters of the same species. See Why Do Oysters Taste Different?