Hippocamp is a water creature that resides in Lake Orizon.
The Hippocamp resembles a horse with a fish tail instead of a horse's hindquarters.
The Hippocampus resides in Lake Orizon and was often used as the mode of transportation for it's inhabitants. When Mombi placed Quiberon into Lake Orizon, one of the things Quiberon did was devour the Hippocampus into extinction. After he turned Quiberon into a statue, the Wizard of Oz used the bones of the Hippocampus to reconstitute them and allow the creatures to live once again. (The Giant Horse of Oz)