Mermaid Party Dangling Swirls - Party Decorations & Hanging Decorations (12 Pcs.) Mermaid Party Hanging Swirls. Make your guests feel like they're floating under the sea by hanging these Mermaid Party Hanging Swirls from your ceiling. Featuring four colorful designs including mermaids, clown fish and jellyfish, these playful ocean dwellers are sure to make your under the sea celebration look spectacular from every angle. Paper. Hangs approx. 25".