Hippocamp (or Hippocampus; Hippokampoi) is a mythological creature shared by Phoenician and Greek mythology; which assembled the head and fore-parts of a horse and the serpentine tail of a fish.
In Greek mythology, Hippocamps were the mounts for Poseidon (the god of horses and god of the sea). In ancient folklore, they were believed to be an adult-form of the seahorse we seen today. In fact, Hippocampus is used as the genus (scientific term to categorize various species) for seahorses.
The Romans also believed in the existence of Hippocampus, with Neptune (Roman version of Poseidon) often driving a sea-chariot pulled by hippocamps.
Hippocamps were often used in the artworks and sculptures in Roman’s fountains and public baths; some of these ancient arts can still be seen in famous tourist sites like the Roman Baths in England and the Trevi Fountain in Rome, Italy.