Horseye is a fictional planet created by Alan Dean Foster for his Humanx Commonwealth universe. The planet has four moons, three distinct sentient species (Mai, Tsla, and the Na) and a continent structure that is dominated by a single, massive ocean. This ocean experiences a constant clockwise current driven by the orbits of the four moons. Horseye is also home to the most spectacular river canyon in the known universe. The planet first appeared in the novel Voyage to the City of the Dead (1984).