Regarding this, what does an aqualung do?
The aqualung let people bring air with them when they went under water, without needing a hose to the surface. The modern name for the aqualung is SCUBA, meaning Self-Contained Underwater Breathing Apparatus. The aqualung works using a "regulator", or "demand valve".
Secondly, who developed the aqualung? Jacques Cousteau Emille Gagnan
Similarly one may ask, what do you think would be an aqualung?
The word "aqualung" was commonly used in speech and in publications as a term for an open-circuit, demand valve-controlled breathing apparatus (even after Air Liquide's patent expired and other manufacturers started making identical equipment), occasionally also for rebreathers, and in figurative uses (such as "the
What happened to us divers?
Aqua Lung International was sold by Air Liquide to Montagu Private Equity by the end of 2016. After U.S. Divers Company was renamed Aqua Lung America, the name U.S. Divers was retained as a trademark for Aqua Lung's line of snorkelling equipment.