Merhorses, often referred to as hippocampi (singular: hippocampus), are mythical creatures that are typically depicted as having the upper body of a horse and the lower body of a fish. These creatures are found in various mythologies and folklore, especially within ancient Greek and Roman traditions.

In Greek mythology, the hippocampus was considered a sea creature associated with the god Poseidon, the god of the sea, earthquakes, and horses. The hippocampi were said to pull Poseidon’s chariot across the sea. They are often depicted in ancient art and literature as elegant and powerful creatures, symbolizing the connection between the sea and horses.

In Roman mythology, they also appear, often in the context of Neptune, the Roman counterpart to Poseidon. Additionally, hippocampi have been depicted in other cultures’ mythologies and artistic traditions, sometimes with variations in appearance but generally maintaining the combination of horse and fish elements.