"Black Swan" is the code-name of a secret operation off the coast of Europe which may have discovered the biggest haul of shipwreck treasure ever found.
Odyssey won't reveal the identity of the ship, or even when it sank, to avoid giving clues to other treasure hunters. Odyssey will only say it went down in international waters.
An American company is in the process of determining the value of a haul of sunken treasure, thought to be the biggest ever discovered. Odyssey Marine Exploration says it is examining more than half-a-million coins from the shipwreck as part of a find that could net it around half a billion dollars. The bounty has sparked public interest in the controversial business of treasure hunting vy Odyssey Marine Exploration.