Suisun Bay is a shallow estuary located in northern California, where the Sacramento River and San Joaquin River converge before flowing into the San Francisco Bay. It is part of the larger San Francisco Bay-Delta system and plays a crucial role in the local ecosystem, providing habitat for various fish and bird species. The bay is surrounded by marshlands and is known for its rich biodiversity. It is also a popular spot for recreational activities such as fishing, boating, and birdwatching. The nearby Suisun Marsh is one of the largest remaining brackish marshes in the state, further enhancing the area's ecological significance.