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.
The giant manta is commonly found offshore, while the reef manta, as its name suggests, is found inshore near coral and rocky reefs. Manta rays live in the open ocean, swimming continuously through the water column instead of resting on the sea floor like other rays. Although much of their time is spent near the surface, they have been known to dive to depths of 100 feet.