Your kid will look like a magical mermaid on Halloween night with this Kids' Mermaid Costume Accessory Set from Hyde and EEK! Boutique?. This costume accessory set features a pink mermaid dress with a sequin-dotted tail and tulle accents, along with two adorable starfish hair clips. This magical mermaid costume will sure help them stand out while trick-or-treating. Hyde and EEK! Boutique?: Thrilling delights. Curious oddities.