This National Geographic documentary examines the numerous species of aquatic life that use the oceans' currents to travel the globe. Cameras follow several of these underwater highways,
.. show full overview
This National Geographic documentary examines the numerous species of aquatic life that use the oceans' currents to travel the globe. Cameras follow several of these underwater highways, showing sea turtles, portuguese men-of-war, giant squid and the hundreds of other creatures as they chase and prey on each other.
