Filming underwater at night requires special lighting techniques. Sometimes the subjects to be filmed are not always planned. Read about the producers who made this stunning series. You can download RealPlayer for free here follow the links for the basic player.

Off the Pacific island of Cocos (Costa Rica) the team film at night. White-tipped sharks are hunting among the coral heads for reef fish, but in total darkness they can only use their sense of hearing and electric signals given off by their prey. Over 30 sharks pile in under the coral but only one will catch the fish.