if you didn’t want to be Ariel growing up, were you even a 2000s kid? Those shimmery fins. That side-swept red hair. The voice that literally moved oceans.
Fast-forward to now, and mermaidcore is peaking harder than your high school crush’s cheekbones.
From TikTok-glam Ursula looks to sea-queen-worthy DIYs, Little Mermaid Halloween costumes are the ultimate blend of fantasy, nostalgia, and Pinterest gold. one thing’s clear: basic isn’t invited to this costume party.
Time to channel your inner ocean goddess.
Mermaidcore is calling are you answering?
1. Classic Ariel With a Gen Z Glow-Up
This isn’t your grandma’s Ariel – think glazed donut skin, mermaid core makeup, and a fiery red wig that’s giving Y2K diva meets Euphoria sparkle. Swap the shell bra for an iridescent bralette and finish it with a green sequin maxi skirt that shimmers with sass. Add pearls in your hair and you’ll be the sea siren TikTok can’t stop duetting.
2. Ursula’s Revenge Look (aka Slay Queen Energy)
Tentacles? Check. Bold brows? Check. Villain origin story? You are the moment. Amp up your look with purple body paint, smoky eyes, and dramatic contouring sharper than a stingray’s tail. Be the misunderstood baddie with killer vocals and even killer style. Channel Lizzo’s energy and strut.
3. Baby Ariel in a Bubble
Photo Credit – @funcostumes
For the tiniest fashionistas, a sparkly teal tutu, soft shell tee, and glittery headband create a baby Ariel vibe that’s too cute to compute. Add a plush Flounder toy and watch everyone at the Halloween party melt faster than sea foam.
4. Pinterest Princess Ariel
Think pastel mermaid tail, embroidered shell crop top, and that dreamy coastal granddaughter vibe. With butterfly clips, pearlescent makeup, and oversized translucent sunglasses, you’re not just dressing up – you’re making aesthetic waves.
5. Couple Goals: Ariel & Eric, But Make It 2025
Ditch the sailor getup for an off-duty model Prince Eric look: linen pants, open white button-down, and beachy curls. Ariel gets a crystal-embellished corset, body chain, and dramatic eye gems. Insta story worthy? Absolutely.
6. Flounder, But Make It Couture
Give your fishy BFF a designer twist with a yellow bodycon, cobalt blue accessories, and a wavy clutch. Bonus points if you add glitter fins on your heels. Are you a fish out of water or just haute couture underwater?
7. Vanessa: The Dark Mermaid Muse
Ariel’s evil twin in disguise? Yes, please. Channel your inner Vanessa with a vintage slip dress, smoky purple eye, and a sinister seashell necklace. Serve suspicious beauty and glamour with secrets. It’s giving “dark feminine aesthetic.”
8. Mermaidcore Barbie Mash-Up
What if Ariel was a Barbie? Picture a bubblegum pink tail, rhinestone shell top, and matching handbag shaped like a conch shell. Barbiecore meets Atlantica – and honestly, the world wasn’t ready.
9. Ariel’s Grunge Era
Imagine Ariel rebelling, cutting her own bangs, and starting a mermaid punk band. Pair ripped fishnet tights with Doc Martens, a studded seashell bustier, and lots of smudged eyeliner. Teen angst, but make it aquatic.
10. Seafoam Sorceress Vibes
Wear an ombré green-to-white cape with chiffon layers that float like ocean mist. Add moonstone jewelry and a crystal-encrusted staff. This isn’t just a look, it’s a vibe shift. Cast spells and break hearts.
11. Ariel’s Met Gala Moment
What if Ariel scored a Met invite? Think exaggerated pearl shoulder pads, sheer train, and dramatic fishtail silhouette. Accessorize with a hair crown of coral and glowing jewels. Pose like the ocean is your red carpet.
12. Cozy Mermaidcore for the “I’m Cold” Girlies
Oversized seafoam knit sweater, shell print leggings, glittery earmuffs, and metallic sneakers. It’s giving Ariel at a pumpkin patch – comfy, cozy, and still iconic.
13. Ariel in Paris (Oui, Chic!)
Channel mermaid meets French girl with a mint beret, ruffled shell blouse, and high-waisted flared trousers. Toss in a mini bag shaped like a sea urchin and speak fluent underwater couture.
14. ’90s Cartoon Ariel Throwback
Rewind to that VHS magic. Teal leggings, lavender bralette, big plastic bangles, and bubble-inspired makeup. Bonus: recreate the swoopy bang and give the people pure nostalgia drip.
15. Ariel as a VSCO Girl
Shell scrunchie? Check. Oversized tie-dye tee with a mermaid pun? Of course. Add a Hydro Flask decorated with Flounder stickers and you’ve got the ocean’s trendiest basic baddie.
16. Glam Witch of the Sea
Mix classic witch aesthetics with mermaid glam: black sequin gown, fishnet gloves, a trident-shaped wand, and lots of moody makeup. Think Ursula meets Morticia – a little spooky, a lot sparkly.
17. Mermaid Pop Star Realness
Turn up the shimmer with a rhinestone bodysuit, thigh-high boots, and a mic-shaped purse. Channel Ariana with a high pony and underwater fog machine energy. Lip-sync “Part of Your World” like it’s your world tour.
18. Baddie Ariel With a Bronx Twist
Faux fur, bodycon dress with a shell pattern, hoops bigger than Scuttle’s opinions, and fierce winged liner. Top with a New Era cap in seafoam. You’re not just a mermaid – you’re that mermaid.
19. Shellphone & Chill Ariel
Rock a mermaid onesie, fuzzy socks, and clutch your iridescent seashell-shaped phone case. Perfect for handing out candy, binge-watching spooky rom-coms, or posting Halloween selfies from the couch.
20. Flapper Mermaid Fusion
1920s meets Atlantis. Picture fringe scales, pearl strands, and a sparkly headband with shell details. Dance the night away with jazz hands and jellyfish glam.
21. Ariel’s Pinterest Mom Era
Matchy-matchy with your toddler? Of course. You in a maxi flowy skirt with shell embroidery, your mini in a tutu with a onesie that says “I’m with the fishy.” Cutest duo in the sea.
22. Neon Mermaid Raver Queen
LED shell bra, neon mesh skirt, body glitter for days, and chunky platform boots. Basically a walking underwater rave. Glowsticks encouraged.
23. Ariel’s Spa Day Look
Towel wrap hair, fluffy robe in sea green, cucumber eye pads, and a glitter face mask. Add a wine glass filled with blue Gatorade and pretend you’re detoxing from Sebastian’s drama.
24. Little Mermaid, Big Tulle Drama
Giant tulle skirt in iridescent teal, structured corset, and glitter tears down your cheeks. This is high drama, perfect for dramatic exits and even more dramatic entrances.
25. Daddy-Daughter Underwater Icons
Dad as King Triton (shirtless with a glitter beard and a trident), daughter as tiny Ariel. Instant heart-melter. Expect double-taps and tears.
26. Ariel’s Coquette Fairycore Fantasy
Baby pink shell top, pearl ankle socks, ballet flats, and ribbons in your hair. Soft girl mermaid magic meets underwater Juliet.
27. The Stormy Sea Siren
Dark blue gown with silver accents, storm cloud eyeshadow, and dripping jewels that look like raindrops. You don’t just walk into Halloween – you roll in like thunder.
28. Y2K Mermaid Mashup
Metallic low-rise pants, bedazzled top, mini butterfly clips, and frosted lip gloss. Ariel if she hung out with the Bratz girls and had a Motorola Razr.
29. Gamer Girl Ariel (Yes, She Streams)
Oversized hoodie with Flounder’s face, pastel headphones, shell-shaped controller, and knee socks. She games, she slays, she saves Atlantica from trolls.
30. Pinterest-Perfect Toddler Ariel
Mini mermaid tail, glittery top, and a pastel flower crown. Carry them like royalty while people coo uncontrollably. Warning: may cause a cuteness riot.
31. Sebastian as Streetwear Star
Red tracksuit, tiny sunglasses, chain necklace, and crustacean claws that click-click to the beat. The crab got drip.
32. Ariel’s Wild West Look
Fringe tail skirt, seashell belt buckle, and a starfish cowboy hat. Yeehaw meets yeehaw-nautica. Imagine her saying “This ain’t her first rodeo… under the sea.”
33. My Little Mermaid Pony Hybrid
Yes, it’s exactly what it sounds like. Teal tail, rainbow mane wig, glitter hooves (aka boots), and winged eyeliner that flutters. It’s giving Friendship is Aquatic.
34. DIY Queen Ariel
Hot glue shells on literally everything, tie-dye your old bralette, and turn that green bedsheet into a tail. Trash to treasure, hun. Ariel would def approve.
35. Red Carpet Ariel
Silk emerald dress, wet-hair look, and metallic coral clutch. Serve face. Serve fins. Serve Ariel at the Oscars.
36. Goth Mermaid in Mourning
All-black scale dress, sheer black gloves, dark plum lip, and a tragic backstory you’ll vaguely reference all night. Lana Del Rey plays in the background.
37. Ariel With a Touch of Techwear
Utility belt of shells, iridescent tactical jacket, neon green fins. She’s sleek. She’s smart. She’s hacked the mainframe – and the main vibe.
38. Grandma Mermaidcore
Crochet shawl, shell-shaped glasses, pastel slippers, and a mermaid tail blanket. Serve wise enchantress of the sea energy and hand out advice (and candy).
39. Ariel the Influencer
Holding a ring light, posing with sponsored shell serum, and sipping mermaid mocktails. Caption: “Sunkissed & sea-blessed 💦✨”
40. Starfish Street Style Ariel
Think oversized jersey with shell graffiti, biker shorts, Nike Dunks, and a pearl-encrusted snapback. Mermaidcore meets NYC curbside culture.
41. Little Mermaid Book Club Edition
Library card clutch, sensible flats, seaweed green cardigan, and a tote that says “Mermaids Read Too.” Belle who?
42. Space Mermaid Ariel
Galactic purple bodysuit, LED fins, and glowing shell headset. She’s broadcasting waves across galaxies and genres.
43. Ariel’s Fashion Week Fantasy
Avant-garde tailcoat, asymmetrical scales, massive pearl earrings, and an attitude that says “Catch me on the Vogue runway or not at all.”
44. BFF Mermaid Pod Look
Each friend is a different mermaid shade (think pink, lilac, mint, and coral). Dance in a sea of sequins and scream-sing “Under the Sea” like it’s karaoke night in heaven.
45. Ariel’s Earth Day Fit
Eco-fab tail made from upcycled materials, biodegradable glitter, and a message: Save the seas, slay the look. Activism never looked so good.
46. Mer-Monster Mashup
One side Ariel, one side sea monster. Split costume, half-glam, half-scary. It’s art school Halloween in the best way.
47. Mermaid CEO Energy
Power blazer in sea green, shell-print silk pants, coffee cup, and a “Part of Your World Domination” planner. She’s booked, busy, and underwater.
48. Flapper Ariel’s Roaring ’20s Revival
Feathered headband, shell-beaded dress, jazz gloves, and a pearl-drenched purse. Dance like Gatsby invited you to a party in Poseidon’s palace.
49. Reverse Mermaid (Yep, Human on Top, Fish on Bottom)
Think fish hat, sequin pants with foot-shaped fins, and full Ariel confusion vibes. Equal parts cursed and clever – but always iconic.
50. The Viral Mermaid Moment (aka YOU)
Record your costume reveal to trending audio, strut past your bathtub like it’s a runway, and drop it in slo-mo. Add a cheeky caption like, “Still salty but make it sexy 🐚✨.”
You’re not just part of their world – you’re trending in it.
From toddler tails to villainous vixens, The Little Mermaid gives us an ocean of possibilities. So why not dress like the fantasy you always wanted to be?
Your costume doesn’t just tell a story it sings one. One about confidence, sparkle, and owning your narrative. Wear it bold, wear it proud. You’re not just dressing up. You’re rising up.
Halloween is the one day where fantasy becomes fashion. Don’t play it safe go full glitter, lean into your villain era, or manifest your mermaid dreams.
Costume season is short, but the memories? Timeless.
So pin this guide, save that inspo, and serve sea-star realness. Ariel who? Oh right, YOU.