In mythology, the Greek god of the sea is Poseidon. He is one of the Twelve Olympian deities in ancient Greek religion and is associated with horses and earthquakes in addition to his dominion over the oceans. Poseidon is often depicted wielding a trident, which symbolizes his power over marine realms and storms. He plays a significant role in various myths, including his rivalry with Athena over the patronage of Athens. Poseidon’s temperamental nature and influence on sea voyages made him both revered and feared by ancient sailors and coastal communities.