The perfect costume for a sea themed party is a mermaid. The Sexy Mermaid Adult Costume is a shiny blue strapless dress that has a fish scale pattern on it. The sweetheart neckline is low and the dress is very tight and short. The hemline ends at the top of the thighs and sheer chiffon hangs around the bottom to suggest the appearance of the mermaid tail. The costume also includes a shell necklace. Shoes are not included, but clear pumps are sold separately. Consider a wig and a seaweed boa to complete the costume. The Sexy Mermaid Adult Costume is a subtle way to dress as a mermaid while still being a striking outfit to wear to any costume party. You'll look chic and sophisticated and nobody will be able to take their eyes off you.