Alexandra Marguerite Clémentine Cousteau (born March 21, 1976) is a filmmaker, sustainability keynote speaker and an environmental activist.

Cousteau advocates the importance of conservation, restoration and sustainable management of ocean and water resources for a healthy planet and productive societies.

[12] In 2010, Cousteau led the Expedition Blue Planet: North America, a five-month, 18,000 miles of interactive exploration of critical water issues[clarification needed] across the U.S., Canada, and Mexico.

[13] Cousteau and her team filmed a range of critical water issues on the Colorado River, the Gulf Coast, the Tennessee Valley, the Great Lakes, and Chesapeake Bay and also stopped in 20 communities along the route to host watershed action days.

[14] In 2014, she led an expedition to Canada in partnership with the Ottawa Riverkeeper and Aqua Hacking 2015, a conference focused on protecting the river.