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) that Neptune was offered the sacrifice of a bull would point to an agricultural fertility context. In Rome Neptune had only one temple. It stood near the Circus Flaminius, the Roman racetrack, in the southern part of the Campus Martius. It already existed in 206 BC. It appears on a coin struck by Gn. Domitius Ahenobarbus around 40 BC doubtless because of a restoration carried out by this personage. It contained a famous sculpture of a marine group by Scopas Minor. The Basilica Neptuni, was built on the Campus Martius and dedicated by Agrippa in honour of the naval victory