The Greek god often depicted with a trident is Poseidon, who is the god of the sea, earthquakes, and horses. In mythology, Poseidon wields his trident to create storms, calm seas, or bring forth earthquakes, symbolizing his immense power over the ocean and nature. He is typically portrayed as a robust figure with a flowing beard and is one of the Twelve Olympian gods. His significance in Greek culture reflects the importance of the sea for trade, travel, and sustenance in ancient life.