AQUARIUS REEF BASE, Fla. - Fabien Cousteau has a week left in his 31-day underwater living experiment in the Florida Keys, but he's not eager to return to the surface.

He says he's panicking about the short amount of time his team of filmmakers and scientists have left during their "Mission 31" expedition. They return to land July 2.

Cousteau spoke Tuesday with The Associated Press inside Aquarius Reef Base, a laboratory 63 feet (19 metres) below the surface in the waters off Key Largo. He said he's comfortable and happy living underwater, although almost all the food has started to taste bland.

Florida International University and Northeastern University researchers joined Cousteau underwater. Cousteau is the grandson of ocean exploration pioneer Jacques Cousteau.