Why an online under the sea birthday invitation?
Whether your child dreams of mermaids, sharks or just the beach, the ocean world sets the scene: a smiling mermaid swims a slow loop with her shimmering tail, bubbles rise, fish dart past, a starfish rests on the sand and jellyfish drift in the blue. The card is a watery gradient with bubbles and starfish, perfect for mermaid birthday invitations too.
Unlike a printable template, it works from a link. Parents RSVP in one tap, tell you how many kids and adults are coming, and can open the address in Google Maps on the day.
Under the sea and mermaid invitation wording
Dive in with one of these messages.
Make a splash! Come dive into an underwater birthday full of games, treasures and cake.
Mermaids, fish and friends of the sea are invited to a very special party. Swim on over!
Something fishy is going on: a birthday! Come celebrate with us under the waves.
Grab your fins and follow the bubbles to the party. The ocean is waiting!
There's a party at the bottom of the sea, with sea-shell treasures and a cake to share. Will you swim by?
Shimmer, splash and celebrate! We'd be so happy to have you at our ocean party.
Calling all little mermaids and deep-sea explorers: the party is on and you're on the guest list.
Waves of fun, oceans of cake. Tap RSVP and dive in with us!
Under the sea party ideas you can do at home
Blues, greens and a touch of shimmer turn any room into an ocean.
Decorations
- Blue and green streamers hanging from the ceiling like waves and seaweed.
- Clear and white balloons floating as bubbles.
- Paper fish, octopuses and starfish taped to the windows.
- A blue tablecloth with shells and a sprinkle of sand in a tray as the centerpiece.
- A 'mermaid lagoon' photo corner with a shimmery curtain.
Games and activities
- Treasure dive: find plastic gems and shells in a tub of water or blue-dyed rice.
- Magnet fishing with paper fish, paper clips and a stick with a magnet.
- Bubble station with wands and a big bucket of bubble mix.
- 'Sharks and minnows' tag in the backyard.
- Decorate a mermaid crown or a paper fish with stickers and sequins.
Food and cake
- An ocean cake with blue frosting waves and candy shells.
- Blue jello cups with gummy fish swimming inside.
- Goldfish-shaped crackers and 'seaweed' snap peas.
- Sandwiches cut with fish and starfish cookie cutters.
Party favors
- A little bag of shells or plastic gems 'from the treasure dive'.
- A mini bubble wand.
- The crown or fish each guest decorated.
- Ocean animal stickers and a coloring page.
How it works
- 1Create it
Choose a design and an opening, then add your child's name, age, date and place. You see a live preview while you type.
- 2Send the link
Share it in your class group chat, by text message, WhatsApp or email. Guests open it in their phone browser.
- 3Watch the replies
Each RSVP lands in your private dashboard with a little burst of confetti: who's coming, how many kids and adults, and any notes.
Frequently asked questions
Are these under the sea birthday invitations free?
Yes, creating and sending one is free. During launch (until 30 November 2026) every feature is free with unlimited replies; after that, the free version includes up to 5 replies.
Does it work as a mermaid birthday invitation?
Yes. A friendly 3D mermaid with a turquoise scaled tail swims through the scene, among coral, fish, jellyfish and bubbles. She's an original character, not from any film.
Can I pick a different opening?
Yes. The magic envelope is the default here, but you can choose the treasure chest, the gift box or any other opening when you create it.
Do guests need to download anything?
No. They open the link in their phone's browser, play the opening and RSVP. No app, no account.
Is it good for a pool or beach party?
Yes. Add the pool or beach address and a note about swimsuits and towels in the message. Guests get a Google Maps button to find the place.
More worlds for their party
Ready to make a splash?
Create your under the sea invitation in about two minutes and share it with one link.
Create my under the sea invitation