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.
2. Mainly large sharks, but in Hawaii the Manta Rays have adapted to the habitat by staying within 3 miles of the shoreline thereby, to some extent, limiting their exposure to predators (like deep water sharks e.g. Tiger Sharks, Hammerheads). Their unmatched maneuverability and speed makes them hard to prey on.