An aqualung is a type of breathing apparatus used by divers to explore underwater environments. It typically consists of a tank filled with compressed air, a regulator to control the air flow, and a mouthpiece or mask for inhalation. This equipment allows divers to stay submerged for extended periods while providing a safe supply of breathable air. The invention of the aqualung revolutionized underwater exploration and activities such as scuba diving. It enables divers to access deeper waters and observe marine life without the need for frequent surface breaks. The aqualung has become essential for both recreational and professional divers, enhancing safety and enjoyment in underwater adventures.