Copano Bay is a northwestern extension of Aransas Bay, west of Rockport, Texas in Refugio and Aransas counties. It is supplied with seawater from the Gulf of Mexico via Aransas Bay, and fed freshwater from the Aransas River, Mission River and Copano Creek. As an estuary, the bay is home to a diverse ecosystem consisting of various birds including the endangered whooping crane, and numerous finfish including the redfish as well as shellfish such as oysters. It is classified as a nursery for shrimp, which prohibits production from the bay.
