Jacques Cousteau and Pierre-Antoine was released in 1954. During the 1940s, Cousteau is credited with improving the aqua-lung design which gave birth to the open-circuit scuba technology used today. According to his first book, "" (1953), Cousteau started diving with Fernez goggles in 1936, and in 1939 used the self-contained underwater breathing apparatus invented in 1926 by Commander Yves le Prieur. Cousteau was not satisfied with the length of time he could spend underwater with the Le Prieur apparatus so he improved it to extend underwater duration by adding a demand regulator, invented in 1942 by Émile Gagnan. In 1943 Cousteau tried
Céline Cousteau ocean explorer and shark advocate, and granddaughter of Jacques Yves Cousteau. She grew up between their family homes in France and the United States, and as the granddaughter of legendary explorer and oceanographer Jacques Cousteau, Celine spent much of her youth aboard his famous research vessel "Calypso", plying the seas in search of answers to the oceans' greatest mysteries. One of her first major expeditions was at age nine when she journeyed to the Amazon with her family. There they spent 18 months navigating its waters in areas that were still largely unknown to the outside world. It was on