The Roman equivalent of the Greek god Poseidon is Neptune. As the god of the sea, waters, and horses, Neptune shares many characteristics with Poseidon, including control over marine storms and the ability to create earthquakes. Both deities symbolize the power and unpredictability of the ocean, reflecting ancient cultures' reverence for water as a life-giving and destructive force. Neptune's worship in Rome highlights the importance of maritime activity and the deep connection to the natural elements.