Hi !!
Jacques Cousteau (I guess you're talking about Jacques-Yves Cousteau) nicknamed "Le commandant Cousteau" is known all over the world for its expeditions with "the Calypso". It was a boat he transformed to an oceanographic research ship for subaquatic (underwater) activities and researches.
He wrote many books, he did many documentaries, he received many prizes.
He worked with people from all over the world.
Yes, he is famous in the USA, maybe not for everyone, but for sure for those who are involved to try to change things about preserving the planet and fighting against global warning, more specifically about preserving the oceans.
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