Neptune (mythology) Neptune (mythology) Neptune ( ) was the god of freshwater and the sea in Roman religion. He is the counterpart of the Greek god Poseidon. In the Greek-influenced tradition, Neptune was the brother of Jupiter and Pluto; the brothers presided over the realms of Heaven, the earthly world, and the Underworld. Salacia was his wife. Depictions of Neptune in Roman mosaics, especially those of North Africa, are influenced by Hellenistic conventions. Neptune was likely associated with fresh water springs before the sea. Like Poseidon, Neptune was worshipped by the Romans also as a god of horses, under the name "Neptunus
Neptune (mythology) connection of him with the sea was attested, and may even have originally been conceived under equine form. Such a feature is a reflection of his own chronic, violent, brutal nature as earth-quaker, as well as of the link of the horse with springs, i.e. underground water, and the psychopompous character inherent in this animal. There is no such direct connection in Rome. Neptune does not show any direct equine character or linkage. On the other hand, Roman god Consus was associated with horses: his underground altar was located in the valley of the Circus Maximus at the foot of