Dark Turquoise Sequin Strapless Sweetheart Gathered Wrapped Mermaid Trumpet Prom Dress2012. Beaded Turquoise Mermaid Dresses are a must have for women who want to look beautiful during prom or any formal occasion. The strapless bodice is encrusted with beads that will dazzle the room. We love this turquoise mermaid dress because the mermaid style skirt has fin like details adding a dramatic touch to this gown. Wear these evening dresses for prom, wedding, formal parties, graduation, homecoming, or for any special event.