Best Halloween Costumes Under the Sea

Are you dressing up for Halloween this year? Are you helping your kids decide on their costumes? What about your K9 kids?

We have curated a selection of under the sea costumes that will impress. From off the shelf to complete DIY — there is sure to be something that will inspire you.

Jellyfish DIY

This Jellyfish costume is simple and fun. Adults and children can create this cute sea creature costume in minutes. (You don’t have to go with neon orange — try pink or blue or even rainbow.)

Click here for the tutorial

Shark Attack

These little sharks are adorable! Add in an adult with a surf board and some fake blood and you have a shark attack! Try creating this DIY shark hoodie for a quick and easy transition from kid (or adult) to shark!

Sea Monster

This whimsical costume is sure to be the only one at the party. Etsy is a great resource for original costumes if you don’t want to DIY.

Deep Sea Diver

This costume is sure to dazzle the neighborhood. Super easy, because it is right off the shelf!

Angler Fish DIY

An eerie costume makeup from the deep sea — this angler fish makeup tutorial is absolutely incredible. Using black light paint and excellent makeup skills, you can transform yourself into one of the creepiest creatures in the sea.

Stingray DIY

This is so cute and original. The tutorial tells you how to achieve the spotted effect. You do need some sewing skills to add the details. Your little stingray will be swimming in candy with this fun DIY.

Fiber Optics Sea Warrior (DIY for the technically inclined)

This costume is dazzling and dramatic. A lot of details and intense work and you can be the most illuminated trick or treater on the block (this one is sure to win a costume contest)!

Baby Mermaid

Cuteness overload! You can order this adorable baby costume on Etsy or you can search for a pattern online and learn to crochet!

Doggy Walrus

HAHAHA! This is so cute! Click this link to see more awesome dog costumes under the sea.

Adult Mermaid

There are too many amazing mermaid costumes to choose just one, so check out this fantastic Pinterest board and see what you like. Combining ideas always makes everything better!