You'll need special equipment to dive down to the depths and admire the marine life.
To breathe under water, a tank with a suitable valve is essential. The latter regulates the flow of air from the tank according to the depth of the diver. You'll breathe through a primary mouthpiece, while a backup mouthpiece distinguished by its bright yellow color is kept under your right arm.
In warmer water, scuba tanks are made from aluminum. In colder water, they're made from heavier and sturdier stainless steel. Most tanks hold 12 liters of oxygen. People who need more oxygen can opt for a 15-liter tank, while kids' tanks tend to hold 8 liters.
If you sign up for a beginner's course at your Club Med Resort, you'll be taught by a professional PADI diver who will choose your equipment in accordance with your body type and the diving conditions.