In both Greek and Roman mythology, the god of the sea is Poseidon in Greek myth and Neptune in Roman myth. Both deities are associated with the calming and destructive aspects of the ocean. Poseidon is often depicted with a trident, symbolizing his power over seas and earthquakes. His temperament mirrors the unpredictable nature of water, representing both life-giving aspects and potential for destruction. Both gods hold immense significance in the cultures that worship them, shaping attitudes toward the sea and maritime endeavors.