Ocean life and sea creatures are fascinating, and they would make a fantastic birthday party theme. Don’t forget to make your own paper lantern fish and jellyfish decorations. Make octopus cupcakes, jellyfish Oreo balls, or marine creature candy pops. Make a DIY fishing pond game to amuse party attendees. It’s so much better down below, where it’s wetter!
Under the Sea Birthday Party Ideas
These under the sea party ideas can simply be incorporated into your own beach or marine themed celebration. Use the ideas as a starting point, but adjust the colors to fit the theme of your celebration.
Fish, crabs, starfish, seashells, fishing nets, the azure sea, and sand come to mind. Sand castles, boats, and fishing are all popular activities. The possibilities are limitless.
Party Decorations
Preparing and decorating for an under the sea theme party is a lot of fun.
Room decoration
Everyone desires an Under the Sea party complete with Caribbean blue water and bubbles. With some colorful fish netting and the theme Scene Setter, you’ll be well on your way to changing your room into an underwater aquarium in no time. Hang a lot of decorations over your guests’ heads to make them feel like they’re underwater.
The numerous ceiling supplies, in addition to fish netting, are a great addition. Several fish dangle from the seascape décor, moving gently in the breeze, almost as if they were swimming. The Tropical Fish Shimmering Spiral can also be used to give some tropical colors to your Under the Sea decor.
Mermaid backdrop
The background is always the most important aspect of a magnificent party table, and this Mermaid backdrop is no exception. The good news is that it is both inexpensive and simple to make, making it ideal for any underwater-themed party.
Cardboard sandcastle
On the party table, one or two cardboard sandcastles would be a great centerpiece. Making this would be a lot of fun, and the completed product would be stunning.
Starfish foam
These starfish would look fantastic as party decorations. If you get the kids to help with the craft before the celebration, you’ll have plenty of starfish to distribute around.
Seashell centerpieces
These seashell centerpieces are versatile and may be utilized in a variety of ways. They might be used to hold up figures or numbers, or even tea light candles could be placed on top. See what you can do with yours by using your imagination!
Hanging jellyfish
Under the sea, there isn’t much more than jellyfish. Make and hang these hanging jellyfish at your next gathering. They’d look great strung up against a backdrop or strewn across the party space.
Party Cakes
Tropical fish cupcakes are ideal for your celebration because you can be sure to catch some fish under the water.
They look great, yet they’re surprisingly easy to build. These cupcakes are easy to prepare if you can dip Oreo biscuits into chocolate.
Or are you enamored with the idea of a fish cupcake but want something a little less exotic? You should try the goldfish beach cupcakes. Simple to create, gorgeous to look at, and delicious to eat.
Chocolate seashells on top of the cupcakes, on the other hand, are extremely lovely. It’s as easy as forming the chocolate mold and then pressing it into the cupcake after it’s set. The finished product is an excellent addition to any sea-themed gathering.
Party Games & Activities
If you’re throwing an under the sea party, here’s a list of simple party games and activities to get you started!
Mermaid slime
Mermaids are ideal for an under-the-sea theme party, and this slime would complement the ocean slime concept well. It’s glitzy, mystical, and enchanting all at the same time. It will be a hit with the kids.
Ocean slime
Another fun party activity is slime, which can be divided into small tubs for the kids to take home. It’s excellent for an under-the-sea party because of the sparkly ocean blue slime hue and ocean characters.
Fish drop
Three clothespins and a target (like a coffee can) are required. Assume the clothespins are a school of fish (you can even draw a fish on them beforehand). If you’re playing with older kids, cut a hole in the coffee cans plastic cover to make it more difficult.
Fishing game
A child’s fishing rod with a clothespin on the line instead of a fishing hook is required for this under the sea party game. “Fish” behind a sheet with a prize on the line, which can be hung by a helper.
Mermaid statues
While the music is playing, all of the players dance and rush around. All players must freeze in a mermaid position as though they are statues when the music stops. Anyone who laughs or moves is a broken statue. Play until only one person is able to move without being captured.
Party Favors
Go on an aquatic trip to get away from the hustle and bustle of a land lover’s life! From the moment they come in, your guests will be wowed by these under the sea party items.
Everyone had a full stomach and, more importantly, a full heart after a fun-filled afternoon! To clean up after pool time, each child received a mermaid kit with seashell soap and a bath bomb as party favors.
Party Invitations
Don’t forget to grab these free printables to send out invitations to your great celebration. Create an epic Under the Sea party invitation with one of our many designs, and your party will be one to remember!
FYI, every template in our site is coming for free and can be customized using your laptop, desktop and even through your smartphone.
How to Download
- What you need to do is click (left-click) the preview image.
- You should see a new page popped-up in your display, then you need to “right-click” the image and select “Save image as”
- Locate the destination folder, or just leave it as it is. Then “Enter” to start the download process.
Please note this, all files/materials have been included in that package, so once it’s finished, you are able to customize it right away.
You won’t have any trouble throwing an incredible party with so many under the sea theme party ideas to select from.
Because all of these ideas are so simple to recreate, you can be confident that you’ll be able to throw a fantastic party even if you don’t have any creative or baking talents.
Allow the children to assist you in the preparation of the party for added excitement and enjoyment.
