The article discusses the H2O style mermaid transformation and the ability to swim underwater. It explains that this style of transformation allows individuals to experience the sensation of being a mermaid while swimming in water. The article emphasizes the enjoyment and excitement associated with this unique activity. It highlights the feeling of freedom and the connection to nature that comes with swimming underwater like a mermaid. Overall, the article conveys the idea of experiencing the fantasy of being a mermaid while swimming.