DIY Mermaid Halloween Display

3 min read September 14, 2026 Christie Troxell
Share this article

What lies beneath the surface of the dark and stormy seas? These Menacing Mermaids invite you to find out! In this unique DIY Halloween display, a mermaid skeleton has been painted in a haunting shade of bioluminescent green, and is surrounded by an eerie kelp forest and haunted sea life. Will you dare to take a treat from this sinister siren? Be sure to check-out the Haunted Island Drive-Thru Haunted House!

Project Time
120 to 130 min
Difficulty
Intermediate
Step
1

Using a Mermaid Skeleton and a can of glossy spray paint in a pale mint shade, carefully cover the surface of the mermaid skeleton with paint. When you've completed the front, don't forget to give her a flip and paint the back, as well! Allow the paint to dry.

DIY Mermaid Halloween Display step 1 part 1
DIY Mermaid Halloween Display step 1 part 2
Step
2

Next, you will create the haunted kelp that will be part of this unique Halloween decor idea. You'll be using three shades of spray paint; medium gray, purple and mint green. Lay Fern Leis into your spray paint area, and spray with one color, then "toss" the leaves, and spray with another color. Continue tossing, spraying and alternating colors until you have covered most of the original green color. Allow these to dry.

DIY Mermaid Halloween Display step 2
Step
3

Select and inflate three tropical fish inflatables. Ensure they are well inflated and securely closed, then cover with matte black spray paint and allow to dry. Remember to also do the opposite side of the fish, as these will be suspended. When they are dry, use a piece of chalk to add "bones" details to the fish, as shown.

DIY Mermaid Halloween Display step 3 part 1
DIY Mermaid Halloween Display step 3 part 2
Step
4

Attach a Dead Sea backdrop to a large piece of cardboard that can stand freely. (Large flat packing boxes are a great option). Leave about two inches of cardboard exposed on each vertical side. Using a hot glue gun, attach the painted "haunted kelp" to cover the sides. You can also drape and swag it across the length of the display backdrop.

DIY Mermaid Halloween Display step 4 part 1
DIY Mermaid Halloween Display step 4 part 2
Step
5

Using hot glue, attach the ocean sea life creatures that you painted earlier to the kelp. The fabric material of the fern leis makes a great base for holding the weight of the decorative and very haunted sea creatures.

DIY Mermaid Halloween Display step 5 part 1
DIY Mermaid Halloween Display step 5 part 2
Step
6

Place a heavy bag of sand into the bucket, and position the pole into these vertically. The pole should be standing vertically and should be secure. Lower the mermaid skeleton over the pole, and conceal the bucket with a length of fabric. Drape the bucket and the mermaid with more of the haunted kelp, or paint up some haunted floral strands as shown here. Add sea life and painted kelp around the base of the mermaid as well.

DIY Mermaid Halloween Display step 6
Step
7

The final step is to add a Halloween wig in a fun shade. I found this fun pink wig, and dressed it with haunted kelp leaves, then placed it on the mermaid skeleton's head. She looks ready to go out for a night on the reef!

DIY Mermaid Halloween Display step 7

Oriental Trading is your go-to source for party supplies, crafts, toys, and novelties. With over 85 years of experience, we offer a wide selection of products at unbeatable prices, making it easy to create memorable celebrations.

Learn more about us