Party - The Little Mermaid, Ariel & Flounder - Self-Sealing, Happy Birthday Foil Balloon - 43cm. Balloons delivered uninflated. Helium inflation for flotation available in store only. Party with your favorite mermaid and her guppy buddy, Flounder! This Giant Little Mermaid Flounder & Ariel Balloon features everyone's favorite undersea princess with her lovable friend, all against a blue water and flower background with the text Happy Birthday". Add this giant foil balloon to your Little Mermaid party decor or include it in a balloon bouquet as a gift for your mermaid princess!