In Greek mythology, the god known for carrying a trident is Poseidon. He is the god of the sea, earthquakes, and horses. Often depicted as a powerful deity, Poseidon wields his trident to create storms, calm waters, or cause earthquakes. His influence over the seas made him one of the most revered gods in ancient Greek culture, essential to the livelihood of seafarers and coastal communities, emphasizing the significance of the ocean in Greek life.