Mermaid School, Paperback/Lucy Courtenay

It is Marnie Blue's very first day at Lady Sealia Foam's Mermaid School , and she's terrified. What's more, her famous diva aunt Christabel was a notorious rebel at the same school, and got up to all sorts of naughtiness. Marnie is soon branded a troublemaker by her grumpy octopus music teacher and wants nothing more than to clam up.