Under the Sea Theme Ideas


Whether for a small get together or a large birthday blowout, "under the sea" can be a good theme idea for both children and adults. From the invitations to the entertainment and decorations, you can keep the theme simple or make it more extravagant. Use your creativity when planning an "under the sea" party.


  • Get creative when making invitations, whether it's for an adult party or a children's party. Create paper invitations with all the details. Then take old soda bottles and roll the invitation inside the bottle for a "Message In a Bottle" idea. These can be sent through the mail or hand delivered. Or, create a paper invitation and have it laminated. Then take a zipper sandwich bag and fill it about halfway with water. Add blue food coloring to make it look like the ocean. Add other small trinkets to make it look ocean-like. Then put the invitation inside the sandwich bag. These invitations must be hand delivered. Or, purchase large shells at the craft store. Write your party details on the back of the shell and send through the mail or by hand delivery.


  • If you're creating a children's party, try decorating with a Disney influence. Decorate with a "Finding Nemo" theme or "Little Mermaid" theme. Have the movies playing at the party or if you're going with "The Little Mermaid," play music from the movie during the party. Or, purchase green and blue balloons for an under the sea feel. Take green streamers and attach them to the ceiling for a seaweed effect. For an adult party, cover lights with a blue cellophane color to make the party have more of an ocean feel. Purchase aquarium backdrops from the local pet store for a more realistic "under the sea" feel. If the party is being held outside, have a bubble machine set up.


  • For children, any refreshment in the shape of a fish or other type of sea creature will be great for the theme. Purchase some cookie cutters and use those to cut the refreshments you're preparing. They work great if you're making peanut butter and jelly sandwiches or crispy rice treats. For adults, try making food and appetizers that involve seafood. Create pots of steamed clams, mussels, crab and shrimp. Or make ceviche and lobster rolls.


  • For children, have a fish piñata, crab races or an ocean-themed pin the tail on the donkey You could also have the children create a mural by placing a large sheet of paper on the wall. Leave a table next to the mural with items such as crayons, washable markers, ocean stickers and other art supplies. Throughout the party, the kids can go up to the wall mural and decorate it. For an adult party, have the adults dress as something ocean-related such as a fisherman, mermaid, octopus, etc. Then vote to see who wore the best costume. The winner of the contest could then win a prize.

Party Favors

  • You can give guests of a kids' party a grab bag of assorted goodies when the party ends. Put items in the bag like themed stationary, assorted candy or anything that's ocean related and will fit in a small bag. For an adult party, send home recipe cards with recipes for what was made at the party and a type of seafood seasoning like Old Bay seasoning. Or send home with your guests tickets to the local aquarium.

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  • Photo Credit sea life image by yang xiaofeng from Fotolia.com
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