Ocean smoothly into oceans of supercritical hydrogen. The atmosphere of Venus is 96.5% carbon dioxide, which is a supercritical fluid at its surface. On other bodies: Ocean An ocean () is a body of saline water that composes much of a planet's hydrosphere. On Earth, an ocean is one of the major conventional divisions of the World Ocean. These are, in descending order by area, the Pacific, Atlantic, Indian, Southern (Antarctic), and Arctic Oceans. The word "ocean" is often used interchangeably with "sea" in American English. Strictly speaking, a "sea" is a body of saline water (generally a division of the
Ocean Girl by a new organization, PRAXIS (Preventative Response And eXtraterritorial Intelligence Service) and by rebels on the Ocean Planet. This group is dedicated to protecting against any threats posed by extraterrestrial life, and its agents comes to believe Neri and her people are a problem for Earth. They thus chased Neri and the Bates boys around the world. When a mysterious underwater pyramid is discovered in the ocean, Neri and the Bates boys enter it and discover more about the Ocean Planet, and Neri's mission on Earth. When the rebellion in the Ocean World is growing, Mera escapes to Earth and