Poseidon's realm is the domain of the Greek god of the SEA, Poseidon. It consists of the SEA, OCEAN, and the SEA, which are all bodies of water. The SEA is a large body of saline water, usually divided into smaller bodies or bays, gulfs, and seas. The OCEAN is the world's largest body of water, covering almost 70% of the Earth's surface. The SEA is a smaller body of water, usually located between land masses. All three of these bodies of water make up Poseidon's realm.