Fabien Cousteau

For the past month, Fabien Cousteau has led a team of aquanauts on a mission living and working at the world’s only undersea research lab, Aquarius. They're set to surface Wednesday. Mission 31 is similar to one his famous grandfather, Jacques Cousteau, undertook a little over 50 years ago. Click on to get a glimpse of what life was like during the 31-day undersea adventure.

Photo by: Kip Evans

Arriving at Aquarius

Fabien Cousteau arrives at Aquarius on June 1. The undersea lab is 63 feet below the surface in the Florida Keys National Marine Sanctuary. Aquanauts enter the habitat through what’s called a moon pool.

Photo by: Kip Evans

Mission 31 aquanauts

The first wave of aquanauts huddle around the table inside Aquarius. From left: Adam Zenone, Andy Shantz, Ryan LaPete, Mark Hulsbeck, Fabien Cousteau, and Kip Evans. Off to the right, you can see the bunks where they sleep.

Photo by: Kip Evans

Fabien and Jean-Michel Cousteau

Fabien gets a visit from his father and fellow ocean explorer Jean-Michel Cousteau.

Photo by: Kip Evans

A visit from 'Her Deepness'

Sylvia Earle, who Jean-Michel Cousteau calls “America’s Jacques Cousteau,” arrives at Aquarius. In 1970, Earle led the first all-female team of aquanauts on a research expedition as part of Tektite II.

Photo by: Kip Evans

An undersea Skype session

Fabien Cousteau has described Mission 31 as an "underwater classroom." He and his team shared their discoveries with viewers through daily Skype video calls with students around the world, live reports on the Weather Channel, and  updates on social media.

Photo by: Kip Evans

Research, research, research

Scientific research was a big part of the expedition. The aquanauts, including Fabien Cousteau and Adam Zenone shown here, conducted research in areas ranging from predator-prey behavior to the effects of pollution and climate change on the health of the ocean.

Photo by: Kip Evans

A grouper named JYC

This goliath grouper that hangs around Aquarius is nicknamed JYC, in honor of Jacques-Yves Cousteau. He’s about 7 feet long and 300-plus pounds.

Photo by: Kip Evans

Visit from a 'vampire'

Ian Somerhalder, an actor  (“Lost” and “Vampire Diaries”) and philanthropist, visited Aquarius.

Photo by: Marc Ostrick

Celebrating Jacques Cousteau

The crew celebrated Jacques Cousteau’s birthday on June 11. The famous ocean explorer, who was born in 1910 and lived until age 87, often donned a red cap.

Photo by: Kip Evans

Jacques Cousteau and his diving saucer

In this June 1963 photo, Jacques Cousteau is seen near his diving saucer in the Red Sea.

In the 1960s, Cousteau led a couple of experiments in undersea living. During Conshelf Two, about a half dozen oceanauts lived and worked in an undersea colony in the Red Sea for 30 days, while a support team worked above the surface. The Oscar-winning film "World Without Sun" chronicled their time underwater.

Photo by: OFF/AFP/Getty Images

Window to an underwater world

A seat at the table at Aquarius gets you this view.

Photo by: Kip Evans

Undersea artwork

While visiting Fabien Cousteau (right), the artist Wyland, known for his works depicting marine life, paints a picture of Jacques Cousteau and Aquarius.

Photo by: Annette Robertson

Night dive

Mission scientists Adam Zenone and Andy Shantz took along UV lights on a night dive.

Photo by: Kip Evans

Adrian Grenier

Aquanaut Grace Young greets actor Adrian Grenier (“Entourage”). Young was part of the second wave of aquanauts joining the mission, along with Liz Magee and Matthew Ferraro, at the midway point.

Photo by: Mission 31

Underwater ballet

Aquanaut Grace Young’s ballet training emerges under the sea as she reaches for an upper shelf in the Aquarius habitat.

Photo by: Fabien Cousteau/Mission 31

The Edgertronic

Aquanaut Liz Magee operates the Edgertronic camera, on loan from MIT. The camera, which shoots ultra high-speed video, was named for Harold “Doc” Edgerton, who was a pioneer in stop-motion photography. Jacques Cousteau was friends with the MIT professor -- “Papa Flash, as we used to call him on Calypso,” says Fabien Cousteau, who grew up on the decks of his grandfather’s boats.

Photo by: Mission 31

Fabien and Jacques Cousteau

Fabien Cousteau on his grandfather's shoulders in 1970.

Photo by: Anne-Marie Cousteau

End of a mission

Cousteau looks out a porthole at Aquarius. At the end of the mission, the aquanauts “decompress” inside Aquarius, enabling them to exit the habitat and safely ascend to the surface. During decompression, which can take 16 to 18 hours, Aquarius is slowly brought to surface pressure, then repressurized quickly.

Photo by: Kip Evans

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