Daughter of the Deep by Rick Riordan (2021)
Harding-Pencroft Academy is where all the best marine scientists, naval warriors, navigators, and underwater explorers go. And similar to beloved Hogwarts, the students are sorted into one of four main houses; Dolphin, Shark, Cephalopod, and Orca. Ana Dakkar is in her freshman year at HP and the prefect of House Dolphin. She also lost her parents a couple of years ago following a disastrous scientific expedition, so HP is the only home she and her brother Dev have. It’s now the end of the school year, and Ana and her class are sent on a top weekend trial at sea. But on the bus ride to their ship, the students witness a terrible tragedy that sets into motion a series of events that will change their lives forever...
Recommended reading age: 9-11 years old