The Tyrrhenian Sea subdivision of the Mediterranean Sea, June 24, 2013   Giang Trang sliced through the clear blue waters of the Tyrrhenian Sea.  Graceful and poised on land, the Asian teen was perhaps even more so underwater, seamlessly banking and turning as she swam amid a small school of giant devil rays.  Reaching wing spans of up to seventeen feet across, the large rays were impressively graceful swimmers, and truly majestic to behold.   The last couple of weeks had been an incredibl