Under the sea birthday invitation with online RSVP

Make an ocean-themed invite, add your party details, and share one link with parents. Replies, kids and grown-ups counts, and allergy notes land in one place.

Use this under the sea invitation
  • Guests don’t need an account
  • Share by text or email
  • Track kids and grown-ups

Free to start. Pick the theme now, sign in when you save.

Sample invitation
Splash · Dive · Bubbles
Under the Sea

Ava

Splish, splash, and under-the-sea fun await!

Ava birthday celebration photo
Dive details

When & where

Date
Sat, Nov 28
2026-11-28＋ Add to calendar
Time
10:30 AM - 12:30 PM
RSVP by Sat, Nov 21
Where
Coral Cove Community Pool, party room
240 Harbor Street, Bayview (opens in a new tab)
Ocean adventures

Dive, splash, snack

💎

Treasure hunt

A pretend dive for sunken gems.

🫧

Bubble play

Big bubbles and giggles galore.

🧜

Mermaid crafts

Make shimmery tails and shells.

Bring along

A few helpful things

  • Swimsuit and towel
  • Goggles if you have them
Let us know

Can you make it?

Sample under the sea birthday invitation for Ava, turning 5, at Coral Cove Community Pool, party room. Fictional sample party.

What you can change

Make it fit your birthday crew

The under the sea design stays, and everything about your party is yours to fill in. Edit the words right on the invite, and set the logistics in a few short fields.

The layout and section style come with the theme. You choose the photo and every line of text.

  • Name and age

    Ava and 5 become your child’s name and age.

    On the invite

  • A birthday photo

    Upload a photo of the birthday kid for the photo frame.

    Setup

  • Date, time, and venue

    Plus the street address so guests can find you.

    Setup

  • Color palette

    Keep the theme’s colors, or pick another palette.

    Style

  • Activities

    Rename each activity card and write what’s happening.

    On the invite · Details

  • What to bring

    Add, edit, or remove items from the bring list.

    Details

  • RSVP deadline

    Guests see the date you need replies by.

    Finish

  • Headings and taglines

    The top strip, tag, and section titles are all editable.

    On the invite

Borrow these words

Under the sea birthday invitation wording

Copy a version, then paste it into your invite and swap in your details.

Short invitation

Make waves! [Name] is turning [age]. Dive in with us on [date] from [start time] to [finish time] at [venue]. Please RSVP by [deadline].

With party details

Join us for [Name]’s under the sea birthday party! We’ll have [activities] and [food] at [venue] on [date]. Please bring a swimsuit and towel. Reply by [deadline] and let us know how many children and grown-ups are coming.

RSVP line

Please RSVP by [date] with the number of children and grown-ups coming. You can add any food allergies or a note for us with your reply.

Before you share

A few details your guests will appreciate

Not every party needs all of these. Pick the ones that fit yours and add a line to the invite.

  • Swim gear

    If there’s water play, list swimsuits, towels, and a change of clothes.

  • Pool rules

    Many pools need a grown-up in the water with young swimmers. Say so.

  • Food

    Let parents know whether it’s a meal, snacks, or just cake.

  • Should parents stay?

    For younger kids, one line saves a round of texts. Grown-ups, please stay and join the fun.

  • Siblings

    Be clear either way so families can plan. Siblings are welcome, just add them to your headcount.

How it works

From invite to headcount

  1. Personalize your invitation

    Start with the under the sea theme, then edit the words on the invite and fill in the date, venue, and bring list.

  2. Share your link with parents

    Copy your invite link and send it however you usually do: text, email, or your class or parent app.

  3. Check your RSVPs and headcount

    Replies show up in your private dashboard with kids and grown-ups counted separately, plus allergy notes and messages.

Questions

Questions and answers

Can I change the name, age, and party details?

Yes. The name, age, headings, and activity cards are edited right on the invite. The date, time, venue, address, RSVP deadline, and bring list each have their own field.

Can I add a photo?

Yes. Upload a photo of the birthday kid and it appears in the invite’s photo frame.

Do guests need an account to RSVP?

No. Guests open your link, choose their reply, and send it. No app or sign-up needed.

How do I share the invitation?

Each invite has its own link. Copy it and share it by text, email, or a class or parent app. CubbyCard doesn’t send messages for you, so you stay in control of who gets it.

Can I count children and adults separately?

Yes. Guests enter how many kids and grown-ups are coming, and your dashboard keeps both totals, along with any allergy notes and messages.

Other themes

More birthday invitations

Splash padCool blues and bubbles for summer water play.See the template →UnicornRainbows, sparkles, and pastel magic.See the template →Garden tea partyBlooms, tiny teacups, and petit fours.See the template →

Browse all birthday invitation templates →

Helpful guides

Ready to make waves?

Start with the under the sea invite, add your party details, and share one link when you’re ready.

Use this under the sea invitation

Free to start.

Under the Sea Birthday Invitation with RSVP | CubbyCard