was the original name for the first open scuba
diving equipment, developed by Emile Gagnan
and Jacques Cousteau
. See Timeline of underwater technology
for details of this development.
Aqualung and Aqua Lung are registered trademarks for diving equipment. Aqualung is also the title of an album by rock band Jethro Tull, who had not at the time realised that the word was a trademark.