In the French Navy's Balloon of the Deep, Marine Explorers Enter a "Puree" of Living Creatures and Sight Strange White-eyed Sharks in the Eternal Night of 4,000 Feet. By Capt. Jacques-Yves Cousteau. The National Geographic Magazine, issue July 1954
Posted here (for non-commercial uses, be civil please) as this is not available via the NG society.