Hosting a mermaid birthday party and want some DIY decor ideas? We’ve rounded up the best from the internet to help you create a mer-mazing mermaid bash!
Balloon board
This balloon arch board makes a grand entrance and photo background for your mermaid party. With pastel balloons, seahorses and flowers your guests will shell-abrate in style!

Mermaids this way!
Point the way to the fun with this super fun mermaid party sign. Either make your own from painted wood and a starfish or buy one online.

I See Sebastian!
Is your mermaid party a Little Mermaid party? Make sure Sebastian is at the party too with this easy to DIY crab decoration. Use an orange or red paper lantern and then glue on some pipe cleaner legs, eyes and claws.

Jellyfish DIY
Make it an under the sea theme with these fun jellyfish DIYs. You can even use this as a party activity with the children. All you need is some coloured bowls, stick on shapes and crepe paper for the tentacles.

Waves backdrop
Conjure up some waves as a backdrop with layered fabric in a soft blue colour. Finished with some sea theme paper decorations and a delicate lace tablecloth, your buffet table will be party-ready in no time.

Mermaid flower centrepiece
Having a more sophisticated mermaid party? These flower arrangements look elegant but still have a mermaid them. Pack in as many flowers as you can to create the waves and then add a mermaid tail to the centre of the arrangement.

Mermaid party hat
Set the party table with these lovely mermaid party hats. Just use a normal paper cone hat and add on the tails for an easy craft DIY.

Shell plates
I love this under the sea theme tablescape, especially the gorgeous pearl-like shell plates. Team them with pastel tablecloth, mermaid placemats, shells and starfish.

Starfish wand
This table setting also has shell plates, however, the starfish wand has caught my eye. Easy to make using a dowel and then glueing on the starfish along with some ribbons.

