From the Texas Parks and Wildlife site:
October 27, 2009 – additional information
The coastal overflight has been completed and found one continuous stretch of red tide bloom extending from southern Mustang Island into Mexico. The bloom is approximately one-half to one mile offshore. Fish kills were seen inside Mansfield Channel and Brazos-Santiago Pass with the dead fish extending out to approximately one mile offshore. It looks as if the fish are being pushed onto the beaches south of the passes.
Flying over the bays, biologists did find two areas of suspected bloom, at the mouth of the Corpus Christi Inner Harbor and in the Vinson Slough area of Aransas Bay.
Red tide cell concentrations were high today around the South Padre Island area.
Fishermen report success in the lower Laguna Madre near the mouth of the Arroyo Colorado.