Aquamarine Costume
Channel the ultimate 2000s mermaid with starfish earrings and seafoam style.
Aquamarine is the beloved, bubbly mermaid from the 2006 fantasy-comedy film of the same name. This costume is a massive favorite for anyone seeking a nostalgic, Y2K-era beachy look. The ensemble captures her human disguise: a breezy seafoam green dress, starfish earrings, and blue-streaked hair.
- Difficulty
- Easy
- Time
- ~30 min
- Budget
- $25–75
Try it on
See yourself as Aquamarine
One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.
One render, $1. No account needed — if it fails you're not charged. Pricing.
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What you need for a Aquamarine costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Aquamarine costume — one box instead of 5 pieces.
Seafoam green dress
A light mint, teal, or seafoam green spaghetti-strap dress, preferably in a breezy chiffon or cotton fabric that hits around the knee.
DIY: Dye an old white sundress using light teal or mint fabric dye.
Starfish earrings
Large, chunky gold starfish earrings that sit directly on the earlobes, just like the talking ones from the movie.
DIY: Paint plastic toy starfish gold, glue them to blank earring posts, and wear them as studs.
Blue hair extensions or chalk
Bright blue clip-in hair streaks or temporary blue hair chalk to mimic her magical mermaid highlights.
DIY: Use temporary blue hair mascara or washable blue hair spray on a few front strands of hair.
Beachy shell jewelry
A simple puka shell necklace or a delicate beaded anklet to lean into the early-2000s coastal aesthetic.
DIY: String small craft shells onto a piece of elastic cord.
Flip-flops or bare feet
Simple metallic gold or neutral-colored flip-flops, or go barefoot if you are at a beach-themed party.
DIY: Use any simple sandals or flip-flops you already own.
Rather not assemble it? See ready-made Aquamarine costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the seafoam green or mint sundress.
- 2
Style your hair into loose, damp-looking beach waves.
- 3
Clip in the bright blue hair extensions near the front of your face, or apply blue hair chalk to a few select strands.
- 4
Secure the large gold starfish earrings on your earlobes, angling them so they stand out.
- 5
Add the puka shell necklace and any beachy anklets or bracelets.
- 6
Slip on your gold flip-flops to complete the casual, sun-kissed look.
Makeup & hair
Create textured beach waves using sea salt spray. Keep makeup fresh and dewy with soft pink lip gloss, a touch of bronzer, and a subtle swipe of shimmery blue or teal eyeshadow on the eyelids.
Aquamarine for couples, groups, kids & more
- couples
- Pair up with someone dressed as Raymond in a classic 2000s lifeguard uniform (red board shorts and a whistle).
- group
- Go as the trio with Claire and Hailey wearing mid-2000s casual beachwear (cargo shorts, layered tank tops, and flip-flops).
- kids
- A mint green tutu dress paired with plastic starfish hair clips makes a comfortable, kid-friendly version.
- Plus size
- A flowy, empire-waist mint green maxi dress provides a comfortable, flattering, and breezy silhouette.
Tips
- Keep a spray bottle of water or sea salt spray handy to refresh your beachy waves throughout the night.
- If the weather is chilly, layer a light denim jacket over the dress to keep the Y2K aesthetic intact.
- For photos, hold one of your starfish earrings up to your ear as if it is whispering a secret to you.
- Make sure the blue hair extensions are visible from the front to instantly sell the character look.
Aquamarine costume FAQ
- What kind of earrings does Aquamarine wear?
- She wears large, chunky gold starfish earrings that are actually alive and whisper compliments to her throughout the movie.
- How do I get Aquamarine's blue hair streaks?
- You can easily achieve this look using bright blue clip-in hair extensions or temporary blue hair chalk on damp hair.
- What color is Aquamarine's dress?
- Her signature human outfit features a light seafoam green, mint, or aqua-colored spaghetti-strap sundress.
Did you know? The iconic talking starfish earrings in the film were actually puppeteered and voiced, serving as Aquamarine's ultimate hype-men by whispering compliments like 'We think you're hot!'