Secret Beauty is a Sunshine Yellow Spiny seahorse with brown eyes who belongs to Moana. She wears a pearl necklace with a green obsidian in the center that resembles Moana's.
While Moana was swimming with her fish friend, Gush, he hid next to a pile of seaweeds to hide, but one of them tickled him and see that one of the weeds was a tail of a seahorse! Moana found Gush with a new friend and saw how the little seahorse blended in the weeds like Gush does. They became friends with the seahorse and Moana named her Secret Beauty.