Sea of Cortez

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Episode 1 of 8

Duration: 1 hour

Series revealing the hidden stories of the deep as a team of four marine experts voyage across the globe to explore our planet's last true wilderness - its oceans.

Over a year, Paul Rose, Philippe Cousteau Jr, Dr Lucy Blue and Tooni Mahto explore how a unique ocean paradise, home to the greatest variety of whales and dolphins in the world, is under threat. They dive stormy seas to investigate how a giant predator, the cannibalistic Humboldt squid, is invading this sea, and search for the threatened hammerhead shark.

In an extraordinary encounter, the team carry out pioneering science on one of the largest carnivores on earth: the 20-metre-long sperm whale. They explore a sunken ship with a tragic human story, and search for evidence that the Sea of Cortez is still growing, they dive along part of the San Andreas fault line. The dive is above waters heated to near-boiling point by the furnace of the inner Earth.

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More episodes

See all episodes from Oceans
  • Oceans film locations:

    A guide to the sites visited by the Oceans team in the Sea of Cortez.

    Sea of Cortez
  • Image gallery:

    Image highlights from the Sea of Cortez dive expedition.

    Sea of Cortez
  • Ultimate dives:

    Watch marine biologist Tooni Mahto talking about her ultimate dive of the series - free diving with a group of "loving" sperm whales.

    Tooni Mahto's ultimate dive videos
  • Ultimate dives:

    Watch Philippe Cousteau talking about his ultimate dive of the series - diving with Humboldt squid.

    Philippe Cousteau's ultimate dive videos


Paul Rose
Phillipe Cousteau
Lucy Blue
Tooni Mahto
Matthew Gyves
Matthew Gyves
Executive Producer
Anne Laking
Series Producer
Helen Thomas


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