China sent all of its operational aircraft carriers to sea, while a U.S. "flattop" remained in the Philippine Sea.
The Chinese navy is gradually extending its operational reach beyond East Asia, the Pentagon said in a report.
The interactive map shows the movement of several species ... Oceana.org reports great white sharks in the Pacific Ocean ...
The U.S. sent one of its 11 aircraft carriers to the Philippine Sea, while another was at Yokosuka naval base in Japan.