Willapa Bay is a large estuary located on the southwestern coast of Washington State. It is known for its rich biodiversity and serves as an important habitat for various species of fish, birds, and other wildlife. The bay is also significant for its shellfish industry, particularly for the cultivation of oysters and clams. The surrounding area features a mix of tidal marshes, mudflats, and forests, making it a vital ecosystem. Willapa Bay is part of the larger Willapa National Wildlife Refuge, which aims to protect and preserve the natural environment and its inhabitants. The bay is also a popular spot for recreational activities like kayaking and birdwatching.