Dive into imagination with our under the idea costumes collection, inspired by the wonders and mysteries of the deep blue sea! Perfect for ocean-themed parties, Book Week, or Halloween, these aquatic outfits let you bring the magic of the sea to life. Glide through the waves in a shimmering Mermaid costume or stir up some trouble in a fearsome bad guys costume from the deep. From sea creatures to storybook favourites, there’s something here for every adventurer under the sea. Free delivery on orders over $120

Make a splash—shop our Deep Blue Sea collection now and find the perfect costume to rule the ocean floor!