In the underwater kingdom of Zadanylei, three mermaid sisters-Zada, Anya, and Leia-set out on a brave journey when a dangerous sea serpent threatens their home. Though each sister is gifted in her own way, their constant disagreements put their mission at risk. To protect their kingdom, they must learn to listen, cooperate, and trust one another.This illustrated children's picture book combines a magical underwater adventure with an age-appropriate exploration of sibling rivalry and teamwork. As the story unfolds, young readers see how patience, empathy, and collaboration can turn conflict into strength. The vibrant ocean setting and expressive illustrations support early engagement while reinforcing emotional understanding.Designed for children ages 4-8, this fantasy picture book is well suited for read-aloud settings at home, in classrooms, and in libraries. It supports social-emotional learning by encouraging positive communication, cooperation, and family bonding through storytelling.An engaging mermaid fairy tale for children, this story offers both imaginative escape and meaningful lessons, making it a strong addition to picture book collections focused on fantasy, family relationships, and emotional growth.