Hippocampus (mythology) Poseidon (or Roman Neptune) often drives a sea-chariot drawn by hippocampi. Thus hippocampi sport with this god in both ancient depictions and much more modern ones, such as in the waters of the 18th-century Trevi Fountain in Rome surveyed by Neptune from his niche above. The appearance of hippocampi in both freshwater and saltwater is counter-intuitive to a modern audience, though not to an ancient one. The Greek picture of the natural hydrological cycle did not take into account the condensation of atmospheric water as rain to replenish the water table, but imagined the waters of the sea oozing back
Neptune (mythology) of Actium. This building substituted the older temple, which in its turn substituted a more ancient altar. Neptune is one of only four Roman gods to whom it was appropriate to sacrifice bulls, the other three being Apollo, Mars and Jupiter, although Vulcan was also allowed the offering of a red bull and a red bull calf. The wrong offering would require a piaculum if due to inadvertency or necessity. The type of the offering implies a stricter connection between the deity and the worldly realm. During the war with Veii in 393 BC the level of Lake Albano ("Albanus