Neptune's Realm is a term used to describe the vast expanse of water that surrounds the planet Neptune. It consists of seas, which are smaller bodies of saltwater, and oceans, which are much larger bodies of saltwater. The seas are typically divided into four categories: the Mediterranean SEA, the Caribbean SEA, the South China SEA, and the Red SEA. The oceans, on the other hand, are much larger and include the Atlantic OCEAN, the Pacific OCEAN, the Indian OCEAN, and the Arctic OCEAN. All of these bodies of water make up Neptune's Realm.