Under the Sea Mermaid Birthday Party

A magical Under the Sea Mermaid Birthday Party like this one will totally make a splash with your guests!

This beautiful Under the Sea Mermaid Birthday Party by Styled By Rosi Gleeson from Australia is every little girl’s dream party! The gorgeous pastel colors and Mermaid Under the Sea Party Decorations and desserts make this birthday magical in every way! If your little mermaid is asking for a fun Under the Sea Mermaid party theme, take note because these ideas will blow everyone out of the water!

Under the Sea Mermaid Party Ideas

  • Pretty Pastel Mermaid Under the Sea Birthday Cake
  • White Balloon Decorations Made to Look Like Bubbles (On Party Table and Around Cake Table)
  • Circular Under the Sea Dessert Table Backdrop
  • Seashell Party Decorations
  • Iridescent Seashell Party Plates
  • Pink and Blue Mermaid Scales Table Cover
  • Starfish and Mermaid Tail Cake Pops
  • Mermaid Scales Favor Bags
  • Watercolor Donuts With Starfish Decor
  • Under the Sea Themed Cookies and Desserts
  • Starfish and Seashell Party Decorations


Under the Sea Mermaid Birthday Party on Pretty My Party

Mermaid Under the Sea Party Supplies and Decorations 


Mermaid Under the Sea Kids Party Ideas

First, we love how the dessert and cake table was kept simple but stylish.

The pastel color palette is absolutely divine, but our favorite detail in this Mermaid Under the Sea Party is the floating clear balloon made to look like bubbles! How creative is that part idea?!



Mermaid Under the Sea Party Decorations

The clear floating “bubble” balloons can also be seen on the party tables too, which is a great table centerpiece idea for an under the sea party theme.



Mermaid Party Table

How gorgeous is that pastel green and pink table cover made to look like mermaid scales? We also love the clear party chairs paid with the pastel party decor.



Seashell Party Plates

Another great element to this mermaid party is the iridescent seashell plates. They look absolutely perfect against the pretty table cover.



Beautiful Mermaid Under the Sea Birthday Cake

The under the sea mermaid birthday cake really made a splash with the party guests.

Everything from the pastel colors and under the sea fondant details to the mermaid tail cake topper, really made the cake a the star of the cake table.



Beautiful Mermaid Under the Sea Birthday Cake

The birthday cake also featured sand, seashells and little pearl candies to really give it that true under the sea vibe. How perfect!


Mermaid Under the Sea Cake

Green Peas Bakery did a fantastic job with the cake. The cake matched all of the birthday supplies and decorations perfectly! It was a true work of art.



Mermaid Tail Cake Topper

We love the ocean waves and mermaid cake topper, which completed this under the sea cake perfectly.



Mermaid Party Food

The other desserts were also true works of art. We can’t get over how perfect the mermaid under the sea cake pops are! They definitely look too good to eat!



Under the Sea Mermaid Party Food

Under the sea themed cookies matched perfectly in blue, pink and purple pastel colors.

How adorable are the seashell cookies too?!


Mermaid Party Donuts With Starfish

The under the sea themed donuts were another fabulous addition to the food.

We just adore the watercolor donuts with starfish and seashell details. What a great idea for a mermaid birthday party!


Mermaid Under the Sea Birthday Desserts

Party guests were able to satisfy their sweet tooth on a variety of gorgeous desserts that fit the theme perfectly.


Mermaid Under the Sea Cake Pops

Here’s a close up of the gorgeous cake pop designs.


Mermaid Pudding

Pretty pudding in the party’s colors were topped with mermaid tails. How adorable! We’re sure the kids couldn’t get enough of all of the desserts at this fun party!


Mermaid Party Favor Bags

The simple DIY mermaid favor bags, also in pastel colors, were the perfect take home for the kids.


Mermaid Under the Sea Birthday Party Ideas on Pretty My Party

What a Magical Under the Sea Mermaid Birthday Party for this birthday girl! Every detail, from the party supplies and decorations, to the cake, food and favors were absolutely stunning.

With a gorgeous color palette, a little creativity and some amazing desserts you can have a fabulous Mermaid Under the Sea Party like this one! It’s perfect for a first birthday or any age!

Vendors & Credits

Planning and Styling: Styled By Rosi Gleeson
Balloons/Furniture Hire: Bee Boo Kids Party Styling 
Cake and Sweets: Green Peas Bakery 
Personalized Placemats and Gift Bags: E Scrap Custom Events 
Invitation and Backdrop Design: Mari Design Arts: @maridesignarts
Kids Table and Chairs: Alegra and Grace Chairs 
Backdrop Printing: Quality Press
Cake Topper: Foot and Flame
What’s your favorite party ideas in this Under the Sea Mermaid Birthday Party? Let us know in the comments below.
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One Comment

  1. I’m curious about the large seashells with the name cut out under the dessert tables. Could you tell me how they were made?

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