The remaining portions of the base were developed as Port San Antonio, an industrial/business park and aerospace complex. San Antonio is home to six Fortune 500 companies and the South Texas Medical Center, the only medical research and care provider in the South Texas region.
1 The giant manta ray is the largest ray species in the world. 2  The giant manta ray has the largest brain of all the worldâs fishes, and much remains to be discovered about its intelligence and social interactions. 3  Despite its massive size, the giant manta ray feeds on some of the smallest organisms in the ocean.
Giant Oceanic Manta Ray (Manta birostris). As its name suggests, the Giant Oceanic Manta Ray is generally larger than its smaller reef resident relatives, with average disc-widths of around 4-5 metres (13-16.5 ft) and in extremely large specimens exceeding 7 metres (23 ft). Large oceanic mantas might weigh up to 2 tonnes (4,440lbs).