In Roman mythology, seahorses were the steeds of Neptune, deity of the Upper Waters. As attributes of Neptune, they represented cosmic forces and the rhythm of the waves. They were also the steeds of Poseidon, a Greek sea god. Daily, Poseidon rode through the ocean on a chariot pulled by seahorses.
Seahorses represented the lunar and humid element of the sea and chaos. Seahorses also carried the dead safely to the underworld. Because of their unique form, the Chinese regarded seahorses as the lesser sons of dragons. In Norse myth, they symbolized the power of water.