Under the Sea Costumes for an Enchanting Party!

Under the Sea Costumes for an Enchanting Party!

Under The Sea Costumes
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Last Updated on March 21, 2024 by Canny Costumes

Welcome to the mesmerizing world of an Under the Sea party, where mythical creatures and vibrant marine life come to life. Get ready to make a splash with these enchanting costume ideas inspired by the depths of the ocean.

Immerse yourself in the allure and fascination of the underwater world. An Under the Sea-themed party brings out the creativity in costume choices, allowing you to embrace the magical atmosphere and transport yourself to an oceanic realm.

Mermaid Costumes and Merman Costumes

Transform into a majestic mermaid or merman with shimmering tails, seashell accessories, and flowing ocean-inspired attire. Enhance your look with mesmerizing makeup and hairstyles that capture the ethereal beauty of these mythical creatures.

Leg Avenue Women's Costume, Cream, One SizeSalty Merman Costume for Men Adult Mermen Costume X-Large Green

Sea Creature Costumes

Take inspiration from the vast variety of sea creatures. Create unique costumes inspired by jellyfish, octopuses, seahorses, and more. Utilize different materials, colors, and textures to mimic the appearance of these fascinating creatures, and add accessories like tentacles or fins to bring your sea creature costume to life.

Dazzling Jellyfish Costume

Create a mesmerizing jellyfish costume using translucent fabrics and flowing tentacles. Incorporate LED lights or glow-in-the-dark elements to mimic the bioluminescent glow of jellyfish.

Women's Jellyfish Costume X-Large

Mysterious Octopus Costume

Craft an extraordinary octopus costume with long, flexible arms using foam or fabric. Experiment with different colors and textures to emulate the unique appearance of an octopus.

color cosplayer Cuttle Fish Blue Yoga Print Leggings for Women Plus Size Fish Scale High Waisted Pants Halloween Costume Tights(Octopus Blue, M)

Graceful Seahorse Costume

Fashion a whimsical seahorse costume with a body-shaped design and a curling tail. Use vibrant colors and intricate details to capture the elegance of these enchanting creatures.

Girl's Seahorse Costume Large

Colorful Clownfish Costume

Embrace the vibrant hues of a clownfish costume with bright orange and white fabrics. Add black stripes and fin-like accents to mimic the iconic markings of this beloved fish.

Rasta Imposta Clownfish, Orange, One Size

Majestic Sea Turtle Costume

Design a captivating sea turtle costume with a shell-shaped back and flippers. Paint intricate patterns on the shell and incorporate shades of green and brown for a realistic effect.

Adult Sea Turtle Costume Turtle Shell Onesie Costume X-Small Green

Enigmatic Anglerfish Costume

Embody the mysterious anglerfish with a costume featuring a large, glowing lure and unique body markings. Incorporate elements of darkness and intrigue to capture the essence of this deep-sea dweller.

Angler Fish Women's Costume Small

Delicate Starfish Costume

Craft a delicate starfish costume using soft, textured fabrics in shades of pink, orange, or purple. Attach additional arms or tendrils to mimic the distinctive shape of a starfish.

Child Starfish Costume Standard

Remember, when creating these sea creature costumes, pay attention to details such as colors, textures, and unique characteristics.

Nautical and Sailor Costumes

Explore the classic nautical theme within the context of an Under the Sea party. Dress up as a sailor with navy-inspired attire, captain hats, and anchor motifs. Consider adding a touch of fantasy by combining nautical elements with mystical accessories and mermaid-inspired details.

Vintage Sailor Men's Costume Medium White

How to Dress Up Like Ursula?

Transform into the captivating and wicked Ursula with these steps. Start by selecting a long, flowing black dress or gown with ruffled or layered details to capture her iconic style. Emphasize Ursula’s color palette by incorporating shades of purple, black, and deep violet into your costume. Mimic her makeup with a smokey eye effect using blue eyeshadows, deep purple or plum lipstick, and contouring with shades of deep purple or mauve blush.

Disney Little Mermaid Prestige Womens Ursula Costume - S

Complete the look with a wavy or curly white wig, a headpiece adorned with sea-inspired elements, and statement jewelry. Embody Ursula’s confidence and powerful demeanor, practicing her voice and mannerisms to truly bring the character to life.

Group Costume Ideas

Make a statement with group costume ideas that embrace the Under the Sea theme. Dive into a school of fish, embark on an adventure as a crew of pirates, or create a mythical underwater kingdom with friends. Coordinate and collaborate to create visually stunning group ensembles that leave a lasting impression.

5 Pcs Adult Pirate Costume Mens Medieval Renaissance Viking Shirt Pirate Bandana Sash Belt for Halloween Cosplay Party (X Large)


Let your imagination swim wild as you explore the enchantment and versatility of Under the Sea costumes. Whether you transform into a mesmerizing mermaid, a captivating sea creature, or a nautical sailor, let your costume reflect the magic of the underwater realm. Dive into your next Under the Sea-themed event and create unforgettable memories that will make waves!

Still looking for more ideas for Party Costumes? Check out our page on 101 Party Costumes ideas.

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