Sea Princesses

Sea Princesses (known as Princesas do Mar in Brazil) is a series of children's books created by the Brazilian writer and cartoonist Fábio Yabu. The series focuses on an underwater world where each species of marine animal is ruled by royal families composed of a human-like race known as the Salinos, who live hidden from surface humans, with the stories centered on the children of these royal families. The first book was released in 2004 by publisher Panda Books, and due to its initial success, was expanded into a media franchise in the following years with new books being made as well as products that included toys and magazines. The books later spawned an animated series in 2007 that was co-produced by Neptuno Films from Spain and Southern Star Entertainment from Australia, which lasted 2 seasons, ending in 2010.