How do you make a jellyfish costume glow?

Use battery-operated LED fairy lights taped inside a clear dome umbrella, diffused with crumpled iridescent cellophane.

What should I wear under a jellyfish umbrella?

Wear solid, light-colored clothing like white, silver, or pastel blue to complement the glowing umbrella without distracting from it.

Is the jellyfish costume hard to walk around in?

It can be slightly cumbersome in tight spaces since you are holding an umbrella, but keeping the ribbon tentacles trimmed above the ankles prevents tripping.

Jellyfish costume diy

Skip the store: Use packing bubble wrap or clear plastic wrap from home. Cut strips of old white t-shirts, plastic tablecloths, or tulle. Wear any solid light-colored clothing from your closet.

AI-generated example

Jellyfish Costume

Light up the night with a glowing, floating DIY jellyfish costume.

The jellyfish costume is a highly creative, whimsical choice that stands out at any nighttime event. Perfect for DIY enthusiasts, this look uses a clear dome umbrella decorated with ribbons and LED lights to mimic a floating sea creature. It is a fun, interactive costume that is surprisingly easy to assemble and offers a beautiful bioluminescent effect.

Difficulty: Medium
Time: ~90 min
Budget: $25–60

See yourself as Jellyfish →What you need Buy the Jellyfish costume

Try it on

See yourself as Jellyfish

One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.

Choose or drop a photo of yourselfJPG · PNG · HEIC

One render, $1. No account needed — if it fails you're not charged. Pricing.

Your photo is sent to Google's Gemini API to make the render and isn't used for training. Renders are AI-generated and labelled.

Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.

Jellyfish costume — Example look · AI-generated

You as Jellyfish

Result

What you need for a Jellyfish costume

Short on time? Buy it ready-made

Spirit Halloween sells the complete Jellyfish costume — one box instead of 5 pieces.

Shop Jellyfish at Spirit ↗

Clear dome umbrella
A transparent, bubble-style umbrella that serves as the main bell of the jellyfish.
Amazon
Battery-operated LED fairy lights
Cool white or blue copper wire LED string lights to create a glowing bioluminescent effect.
Amazon
Iridescent cellophane or bubble wrap
Used to line the inside of the umbrella to diffuse the lights and add texture.
DIY: Use packing bubble wrap or clear plastic wrap from home.
Amazon
Assorted ribbons and trim
A mix of sheer organza, satin, and ric-rac ribbons in white, pink, blue, or purple to act as tentacles.
DIY: Cut strips of old white t-shirts, plastic tablecloths, or tulle.
Amazon
White or pastel clothing
A solid white, light blue, or lavender dress, leggings, or jumpsuit to keep the focus on the umbrella.
DIY: Wear any solid light-colored clothing from your closet.
Amazon

Rather not assemble it? See ready-made Jellyfish costumes at Spirit Halloween ↗

How to put it together

1
Open the clear dome umbrella and tape the battery pack of the LED fairy lights to the center handle near the top spokes.
2
Weave the LED string lights along the metal spokes inside the umbrella, securing them with clear tape.
3
Line the inside of the umbrella dome with crumpled iridescent cellophane or bubble wrap to diffuse the light and create a textured look.
4
Cut various lengths of ribbons, tulle, and yarn (ranging from 3 to 5 feet) to serve as tentacles.
5
Tie or tape the ribbon tentacles securely around the lower rim of the umbrella, letting them hang down freely.
6
Put on your solid white or pastel base clothing.
7
Hold the umbrella handle above your head to complete the floating jellyfish effect.

Makeup & hair

Keep makeup ethereal with iridescent highlighter, silver eye glitter, and cool-toned eyeshadow. Hair can be styled in sleek, wet-look waves or pulled back to keep it from tangling with the hanging ribbons.

Jellyfish for couples, groups, kids & more

couples: Pair with a scuba diver or a shark costume for an under-the-sea couples theme.
group: Have everyone choose a different color of LED lights and ribbons to create a glowing swarm of jellyfish.
kids: Use a smaller child-sized clear umbrella and shorter ribbons to prevent tripping.
Plus size: This costume is highly inclusive as the main element is a handheld umbrella; wear any comfortable, solid-colored base layer.
pet: A small dog sweater decorated with short, lightweight tulle strips can mimic a mini jellyfish.

More ways people search for this costume

The most-searched variations of “Jellyfish costume”, and how this look adapts to each.

Jellyfish costume diy: Skip the store: Use packing bubble wrap or clear plastic wrap from home. Cut strips of old white t-shirts, plastic tablecloths, or tulle. Wear any solid light-colored clothing from your closet.

Tips

Keep the tentacles slightly shorter than your feet so you do not trip on them while walking.
Bring extra batteries for the LED lights to ensure your costume stays glowing all night.
Hold the umbrella high in photos to show off the hanging ribbons and glowing dome.
If attending a crowded party, keep the umbrella partially closed or opt for a wide-brimmed hat decorated similarly to save space.

Jellyfish costume FAQ

How do you make a jellyfish costume glow?: Use battery-operated LED fairy lights taped inside a clear dome umbrella, diffused with crumpled iridescent cellophane.
What should I wear under a jellyfish umbrella?: Wear solid, light-colored clothing like white, silver, or pastel blue to complement the glowing umbrella without distracting from it.
Is the jellyfish costume hard to walk around in?: It can be slightly cumbersome in tight spaces since you are holding an umbrella, but keeping the ribbon tentacles trimmed above the ankles prevents tripping.

Did you know? Real jellyfish are bioluminescent, meaning they produce their own light, which is why adding LED lights to this costume makes it incredibly accurate to nature.