Living Underwater...
In July 2001 Roy Caldwell led an underwater “mission” in the Aquarius habitat. The Aquarius is the world’s only operational underwater habitat being used for basic research on marine systems. Because the scientists lived underwater, they were able to spend much more time collecting data, and learned a lot about the behavior of stomatopods in their natural environment.
For much more information on the Aquarius habitat, including the aquanauts' mission journals, link to the mission archive on the National Underwater Research Center’s AQUARIUS Web site!
The Aquarius habitat as seen from outside
The inside of the Aquarius habitat; Image courtesy of NURC