 Abundant collections of black drum, flounder and trout, can also be found in the bay.Oysters grow in large numbers to form elongated reefs "oriented perpendicular to tidal flow" in the estuary.The reefs provide habitat for fish and sustenance for a wide variety of birds including the black-bellied whistling-duck, black-necked stilt, brown pelican, gull-billed tern, reddish egret, roseate spoonbill, seaside sparrow, white-faced ibis and the whooping crane.