How can a mermaid in an aquarium not take oxygen?

Mermaid performers in the aquarium can breathe under water without oxygen because they have practiced free diving skills.

Free diving is a kind of skill that does not depend on any external breathing equipment, but only floats under the water by itself. Free diving includes static breath holding and dynamic breath holding. Static breath holding means that mermaid performers are still in the water and hold their breath; Dynamic breath holding means that they hold their breath while swimming and performing in the water.

Mermaid performers need to undergo strict training and preparation when diving freely. They need to exercise their vital capacity and endurance to increase their breath-holding time and endurance in underwater sports. In addition, they also need to learn correct breathing skills, body control and safety regulations to ensure underwater safety and smooth performance.

It should be noted that free diving is a high-risk activity and requires strict compliance with relevant safety regulations and operating procedures. Mermaid performers need to undergo a comprehensive physical examination and health assessment before performing to ensure that they are suitable for free diving performances. In addition, they also need to maintain a good psychological state and avoid excessive tension and anxiety to ensure the safety and success of the performance.

In a word, mermaid performers in Aquarium can breathe under water without oxygen, because they have undergone professional training and preparation, mastered the skills of free diving, and strictly abide by relevant safety regulations and operating procedures.