It Looks Like The Mermaid Is Floating,

in midair,

 but she is not,

 Marchenko embroiders images on translucent tulle, 

She explains to Bored Panda that the effect of tulle is that "it makes embroidery visually more voluminous." tulle is a lightweight, very fine, stiff netting, it can be made of various fibers, including silk, nylon, polyester and rayon. Polyester is the most common fibre used for tulle, rayon tulle is very rare, tulle is most commonly used for veils, gowns, and ballet tutus, and for making fish nets for the aquatic trade, over the years I have often seen embroidery, but none quite like this.