- Joseph Dituri
- 100:00:00 day(s):hour(s):minute(s)
- United States (Key Largo)
The longest time spent living in an underwater fixed habitat is 100 days, and was achieved by Joseph Dituri (USA), who entered Jules’ Undersea Lodge, a steel-and-glass facility anchored at a depth of 9.14 m (30 ft) just off the coast of Key Largo, Florida, USA, on 1 March 2023, as verified on 9 June 2023.
Joseph Dituri is living underwater as part of Project Neptune 100, which was organized by the Marine Resources Development Foundation. He plans to stay underwater for 100 days.