The minimum age requirement for scuba diving varies from country to country, but in most places, it is 12 years old.

Recreational scuba divers are typically allowed to reach a maximum depth of 30 meters (100 feet). This depth limit is set to ensure the safety of divers and to minimize the risk of decompression sickness.

Open-circuit scuba diving equipment is the most common type of scuba diving equipment used by recreational divers. This type of equipment consists of a tank of compressed air or nitrox, a regulator, a buoyancy compensator device (BCD), and a mask.

A buoyancy compensator device (BCD) is used to control the diver's buoyancy. It is a vest-like device that is worn by the diver and can be inflated or deflated to adjust the diver's buoyancy.

The most important safety rule to follow when scuba diving is never to dive alone. Diving alone is extremely dangerous and can lead to serious injury or death.

Fish are the most common type of marine life that scuba divers encounter. There are over 20,000 species of fish in the world, and many of them can be found in scuba diving destinations around the globe.

The Great Barrier Reef is the largest coral reef in the world. It is located in the Coral Sea, off the coast of Queensland, Australia. The reef is over 2,300 kilometers (1,400 miles) long and is home to a wide variety of marine life.

The scientific name for the sea turtle is Chelonia mydas. Sea turtles are a type of reptile that live in the ocean. There are seven species of sea turtles, and they can be found in tropical and subtropical waters around the world.

The whale shark is the largest species of shark in the world. It can grow up to 18 meters (60 feet) long and weigh up to 47,000 kilograms (103,000 pounds). Whale sharks are filter feeders, which means that they eat plankton and other small organisms.

The stonefish is the most venomous fish in the world. It is found in the Indo-Pacific region. The stonefish has a camouflage that makes it look like a rock, and it can deliver a powerful sting that can be fatal to humans.

The Mariana Trench is the deepest point in the ocean. It is located in the western Pacific Ocean, near the Mariana Islands. The deepest point in the Mariana Trench is the Challenger Deep, which is 11,034 meters (36,201 feet) deep.

Victor Vescovo is the famous underwater explorer who made the first solo dive to the bottom of the Mariana Trench. He reached the bottom of the Challenger Deep on March 26, 2019, in a specially designed submersible called the Limiting Factor.

Queen Anne's Revenge is the name of the famous shipwreck that is located off the coast of North Carolina. It was the flagship of the pirate Blackbeard, and it sank in 1718. The wreck was discovered in 1996, and it is now a popular scuba diving destination.

Sac Actun is the name of the underwater cave system that is located in Mexico. It is the longest underwater cave system in the world, with a length of over 215 kilometers (134 miles). Sac Actun is a popular scuba diving destination, and it is home to a variety of marine life, including blind cave fish and shrimp.

MUSA is the name of the underwater museum that is located in Cancun, Mexico. It is a unique museum that features over 500 sculptures that are submerged in the ocean. MUSA is a popular scuba diving destination, and it is a great place to see a variety of marine life.