Some things just run in the family, for example good looks, tallness, heart disease or underwater exploring. Does the name Cousteau mean anything to you?

Jacques-Yves Cousteau may spring to mind, but his hay day was half a century ago. No, we are talking about his 46-year old grandson, Fabien.

The 46-year-old ocean explorer and documentary filmmaker finished his stint in an underwater lab 63 feet deep off the coast of Key Largo, Florida, on Wednesday, rising to the surface after a brief layover in a decompression unit. The project, called Mission 31, provided a platform to study oceanic pollution and climate change and their impact on wildlife, as well as to conduct scientific experiments on coral reef.

Cousteau lived and worked in the underwater lab, known as Aquarius, for 31 days on end, the longest period of time spent at that depth in that specific lab. Aquarius is operated by Florida International University in Miami and typically does only 10-day missions. Scientists and researchers from FIU did two-week shifts with Cousteau throughout the month-long period.

Fabien says the mission was to pay homage to the work of his grandfather as well as other aquanauts and ocean researchers before him, to better understand the “human-ocean connection.”

We cannot wait to see what footage has surfaced with the young Cousteau. For more info and pics check out Mashable.