Saginaw Bay is a large bay located in the eastern part of Michigan, USA. It is an extension of Lake Huron and covers approximately 1,143 square miles. The bay is known for its rich biodiversity, including various fish species, making it a popular spot for fishing and recreational activities. The bay is bordered by several towns, including Bay City and Saginaw, which contribute to its local economy. Saginaw Bay is also significant for its wetlands, which provide essential habitats for wildlife and help maintain water quality in the region.