Join Barbie "Brooklyn" Roberts, Barbie "Malibu," and her sisters Skipper, Stacie, and Chelsea on an aquatic journey as they become mermaids to defend Pacifica! In Barbie Mermaid PowerTM, Isla (from Dolphin Magic) summons Barbie and Barbie to compete to be the underwater Power Keeper. These competitions reveal if they are Earth, Air, Water, or Fire mermaids while making new animal and mermaid companions. Barbie, Barbie, and family discover how to balance the worlds above and below the water and find their inner strengths in this fish-tale of friendship, adventure, and bravery.