The billfish are the biggest, fastest, and most dangerous gamefish in the sea. These types of marine creatures have captured man's imagination over the centuries, whether it's the graceful sailfish, the menacing swordfish or queen of them all, the marlin, immortalised by Hemingway in The Old Man and the Sea.
Marine biologist and film-maker Rick Rosenthal has travelled three oceans in his attempt to capture them all on film, and in doing so has become a passionate champion for these endangered yet little-known ocean giants. Throughout the film we see Rick's incredible footage and get to know the billfish, and others, up close and personal.