Satin Fishtail Gown Best Wedding Guest DressThe fishtail or mermaid silhouette works because it follows the bodys natural lines rather than imposing a shape onto them. The fitted cut from bodice through the hips creates a sleek, sculpted line, and the dramatic flare below the knee releases into a sweeping skirt that moves with authority. On a satin gown, that silhouette has a luminous, high end quality: the fabric catches light with every movement and drapes fluidly over the fitted sections