Get the full story on marlin, sailfish, spearfish and swordfish — the most highly prized of all gamefish.

They slice through the water’s surface with explosive power — sail, spear and half a ton of muscle flashing in the sun. Their journeys through the open ocean are epic, their life cycle, bizarre. They are the billfish — marlin, sailfish, spearfish and swordfish — largest and most highly prized of all gamefish. Their astonishing story has never been fully told. Emmy Award-winning filmmaker and biologist Rick Rosenthal brings a lifetime of experience with these astonishing sea creatures to the screen as he observes tiny billfish nurseries in the wild, dives deep into secret undersea canyons, films incredible color-changing behavior and embarks on a quest for an elusive thousand-pound “grander.”