Jacques-Yves Cousteau (11 June 1910 – 25 June 1997) was a French naval officer, explorer, ecologist, filmmaker, scientist, photographer and researcher who studied the sea and all forms of life in water. He co-developed the aqua-lung, pioneered marine conservation and was a member of the Académie française.
Cousteau was born in Saint-André-de-Cubzac, Gironde, to Daniel and Élisabeth Cousteau. He is generally known in France as le commandant Cousteau ("Commander Cousteau"). Worldwide, he was commonly known as Jacques Cousteau or Captain Cousteau.