La princesa bajo el mar (Marina Sirena 1)

Marina is an ordinary girl who has just arrived on Coral Island. What she doesn't know is that her life is about to change! She has a new school, new friends, and… a mermaid tail? Alongside the mermaid princess Niebla and with her newfound magical powers, Marina discovers an underwater universe where great adventures await. Becoming a mermaid is amazing! But meeting the mermaid princess isn't as fun as Marina thought. When the two discover that something strange is happening at the bottom of the sea, they'll have to put their differences aside to solve the mystery. Will you join them on their first underwater adventure?