What kind of diving is used in the mermaid diving performance?

What kind of diving is used in the mermaid diving performance? The answer is as follows:

Mermaid divers use free diving.

Data expansion:

Free diving refers to diving as deep as possible only by self-adjusting abdominal breathing and holding your breath without carrying a gas bottle. Free diving includes free diving activities such as entertainment, experience, photography and hunting, as well as extreme breath-holding deep diving of competitive nature.

The earliest origin of free diving can be traced back to ancient times. In order to survive, people hold their breath, dive into the sea to touch snails, catch crabs and stick fish with homemade harpoons. In ancient times, due to the lack of oxygen supply equipment and backward technology, especially for fishermen who lived on the island all the year round, holding their breath to catch food in the sea was the earliest, and later it was gradually systematized and specialized by some people who loved this sport.

Created the extreme sport of free diving, many countries still retain the ancient traditional custom of holding their breath to catch seafood, such as Japan, South Korea (sea girl) and many small tropical island countries.

Free diving is undoubtedly very dangerous, and drowning is one of the risks. When divers dive, seawater will exert great pressure on their lungs, and some people may even have so-called "shallow water fainting", and lose consciousness when approaching the water surface during floating.

This sport requires high physical fitness, but it also requires strict personal attention. You must get rid of all distractions and devote yourself to diving.