The Best Little Mermaid Halloween Costumes for All Ages and Genders

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While there are always the tried-and-true Halloween costumes to choose from — like a black cat, a witch, a police officer, a zombie, or a clown — what's more fun than dressing as someone from a movie or TV show that everyone's been obsessed over in the last year? What landed in the 2023 pop culture zeitgeist that can be your inspiration this Halloween?

Consider being inspired by The Little Mermaid, which was released this past May and had rave reviews. There are several characters to pick from, and age is not even a factor. Do you want to be the iconic red-haired mermaid Ariel? We've got you covered. Or would you like to dress up as an adorable sea creature like Flounder or Sebastian? We found those costumes, too! King Triton, Ursula, and Prince Eric are also fun options. And, if you have your sights set on a group costume, everyone can take their pick from the lot.

Check out the best Little Mermaid costumes below!

Little Mermaid Ariel Costume for Girls

This collection is truly complete with a mermaid dress inspired by the Little Mermaid herself, Ariel, plus a wig, necklace, and headband. The skirt is adorned with shimmery scales for extra pizzazz. Choose from long-sleeve and short-sleeve options based on the weather you're expecting.

More: 51 Best Halloween Costumes for 2023 That Are a Guaranteed Win

Adult Sebastian Costume

Go all out and dress as the short-tempered crustacean from your favorite Disney film. This elaborate Sebastian costume comes with a jumpsuit, tunic, headpiece, shoe covers, and, most importantly, a shell! Anxious energy, not included. You'll have to bring your acting A-game.

Ursula Costume for Women

Guaranteed, this Ursula number will win the Halloween costume contest. Its plush tentacles will stun, as will your singing voice—until Ariel gets it back, that is. The skirt comes with two skirt hoops to add volume so you can be as grand as the villainous sea witch. The makeup is not included, by the way, so prepare accordingly.

Flounder Costume for Kids

Want to go as the lovable fish who also happens to be Ariel's best friend? This pullover fish tunic can be worn with any outfit underneath. Complete with Flounder's smiling face, signature stripes, and fins, the exterior of this suit is like a soft plush shell.

Prince Eric Costume for Adults

Of all the Disney princes, Prince Eric continues to be a fave. Now, you, too, can be a mermaid's leading man by wearing this costume, complete with a shirt, pants, a sash, and boot covers. You'll appreciate the quality jersey knit, twill, and satin fabrics it comes in.

Adult King Triton

Get your mean, scary dad voice ready, King Triton. Made of polyester, this costume set comes with armor and a gauntlet. However, you will have to add the rest (like pants, a crown, and the trident). Go without an undershirt if you dare.

Seagull Halloween Onesie

Made of 100% fleece, this silly onesie looks just like the lovable, advice-giving seagull, Scuttle, from Little Mermaid. And the best part is, you can wear it year-round. Long after Halloween, you can use this costume as pajamas.

Ariel Blue Dress for Women

Remember in the movie when Ariel was granted legs? This satin number is reminiscent of what she wore as a first-time human. Not your typical Little Mermaid costume, this sweet "land" outfit—made for women—is effortlessly pretty. Simply wear it with black ballet flats you already have.

Ariel Deluxe Costume for Adults

Look at this dress! Isn't it neat? We love an adult costume that's designed like cocktail wear. Perfect for a night out on Halloween, this satin Ariel dress comes with a glittery bodice and a shimmery mermaid-style (get it?) skirt.

Ursula Costume Bodysuit for Babies

The baby who wears this adorable Ursula costume is not a poor, unfortunate soul, as her song would suggest. Make your little one the cutest villain with this one-piece dress that'll be easy to slip on, plus Ursula's signature hair. The velvet "necklace" is attached, so you won't have to worry about losing accessories.

Flounder Costume Bodysuit for Baby

Your baby may have zero idea what Halloween is, but that's no reason to skip dressing up. This flounder costume, made of 100% cotton, will be effortless because it's built like your usual baby bodysuit. Booties and a beanie cap are also included to complete the look — so let's hope baby keep 'em on.

Prince Eric Costume for Kids

Even if your little one hasn't seen Little Mermaid yet, if he is one with the sea, this three-piece Prince Eric costume should be considered. Capture the leading man's spirit of adventure and heroic vibes with this top, pants, sash, and boot coverings. It can also double as a pirate costume if that's more his speed.

Little Mermaid "Land" Halloween Party Dress

When Ariel finally marries Prince Eric, she wears the loveliest wedding gown, just like this one. Not a common Little Mermaid costume, this elaborate "land" outfit—made for girls ages 4 to 8—is double-layered to create a 3D fit. This bridal gown also comes with a headband, a necklace, clip-on earrings, a ring, and a bracelet.

Crazy Crab Hat with Claws

Looking for an effortless costume? Basically, this one is a hat in the shape of a crab with an antenna, plus latex claws to wear as gloves. To serve up "Sebastian," wear this with an all-red outfit and give yourself his signature voice.

Shiny Fish Scale Mermaid Leggings

These leggings are aimed at gals who have to go somewhere in costume but have the added challenge of dressing like it's a typical day (think: teachers). Wear these fish scale leggings that remind us of Ariel with any cute top and a red wig to capture the Little Mermaid's look.

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