Pacific Oyster
Scientific Name: Magallana gigas
Category: shell
Brief Description
A large, reef-building bivalve mollusk commonly found in the intertidal and subtidal zones of the Pacific Northwest.
Characteristics
Irregular, elongated shell with highly fluted, wavy edges. The color is typically gray-white with purple or reddish-brown streaks. The interior is white with a deep purple muscle scar.
Habitat
Intertidal and shallow subtidal zones on rocky, sandy, or muddy bottoms, often attached to rocks or other shells.
When to Find It
Can be observed year-round during low tides.
Conservation Status
Invasive in some regions; widely cultivated and stable in the Pacific Northwest.
Ecological Role
Filter feeders that improve water quality and provide structural habitat for other marine life by forming oyster reefs.
Easily Confused With
Olympia Oyster (Ostrea lurida), which is much smaller, rounder, and lacks the dramatic fluting of the Pacific Oyster.
Observation Tips
Best observed at low tide along rocky shores or mudflats; wear sturdy boots to protect feet from the sharp shell edges.
Interesting Facts
Native to Asia, they were introduced to the Puget Sound in the early 20th century and have since become the foundation of the local shellfish industry.
User Notes
Puget sound