Place paper mermaids in fake mesh nets on blue saran wrap across the walls.
Give out cups that are made out of hollowed out cocoanuts cut in half.
Include some nice Hawaiian music playing in the back ground.
Ask guests dress in Hawaiian shirts or bathing suits.
Party favors:
• Hawaiian Leis
• Seashell necklaces.
• Sunglasses
• Gift certificates to a pet store for a free goldfish.
Banana Split Party
Have everyone bring a "dressed up" banana and judge the bananas so that the winner gets a prize.
Have banana splits during the party.
You can judge the banana by a point system.
For example, if someone brings a banana that has a hat they get so many points, etc. | 
