Hundreds of meters below the surface lurks a predator older than the dinosaurs and bigger on average than the great white. This is the story of a group of scientists who came together to achieve the unthinkable: tagging the cryptic bluntnose sixgill #shark in its natural environment using a submarine. This is a product of One Big Wave, produced by #OceanX in partnership with the Moore Charitable Foundation and the Bloomberg Philanthropies Vibrant Oceans Initiative. Research by the Cape Eleuthera Institute and Florida State University Coastal & Marine Lab.

Florida scientists have tagged a deep-sea shark from a submersible, a historic first that took three expeditions, more than 2,000 pounds of bait, custom-built spear guns and over a dozen tries.