Capturing the courtship of large marbled stingrays is like filming a ballet. <br /><br />From Shark Mountain, airing on the NATURE series, July 29th at 8 p.m. (ET) on PBS (check local listings). The film takes viewers to Cocos Island in the Pacific, where sharks of all kinds converge in staggering numbers. <br /><br />For more information, visit <a class="link" rel="nofollow" href="http://www.pbs.org/wnet/nature/sharkmountain/index.html">http://www.pbs.org/wnet/nature/sharkmountain/index.html</a>
