The Greek god of the sea known for wielding a trident is Poseidon. He is one of the twelve Olympian deities and governs all bodies of water, as well as earthquakes and horses. Poseidon is often depicted as a bearded figure with a trident, symbolizing his control over the sea. His temperament can be fierce, reflecting the unpredictable nature of the ocean. He plays a significant role in many myths, particularly those involving sailors and coastal communities.