Coordinates: 27°54′28″N 97°06′46″W / 27.9078°N 97.11277°W
Redfish Bay is a southwestern extension of Aransas Bay in Texas, north of Corpus Christi Bay. It separates the cities of Aransas Pass and Ingleside from Port Aransas on Mustang Island.
Redfish Bay is found at N 27.9078 and W -97.11277. Overall, it is extremely shallow and contains several small islands, salt marshes, channels and shallow mudflats. The bridge from Aransas Pass to Port Aransas splits the bay into two sections.
The northernmost extensive beds of seagrass in Texas, including Turtle Grass (Thalassia testudinum) and Shoal Grass (Halodule beaudettei), are found in the bay. In June 2000, the Texas Parks and Wildlife Department designated the bay as a scientific area to study the seagrass, as a result, the Redfish Bay State Scientific Area was established. By May 2006, new boating regulations were put in place to prevent damage to the grass. Every February since 2007, the city of Aransas Pass holds the Redfish Bay Trash Parade and Coastal Cleanup, an event that encourages the removal of trash and waste from the bay, due to pollution. In 2009, 90 volunteers cleared three pickup loads of trash that included syringes, construction hard hats, ribbons and busted balloons.