Poseidon was one of the principal gods of Greek mythology, the son of Cronus and Rhea, and the brother of Zeus and Hades. He was the god of the sea, earthquakes, and horses. Poseidon is often depicted as a bearded man carrying a trident, symbolizing his dominion over the oceans. He was known for his impulsive nature, and it was often said that he would stir the waters when angry. Poseidon was also associated with the creation of horses and the ability to cause earthquakes, symbolizing his power over the movements of the earth and sea.