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An Ocean World is not an official Imperial planetological classification, but is a term in common usage among Imperial citizens for those planets whose environments are a single, globe-straddling ocean across their entire surfaces, with perhaps only a few small archipelagos of islands serving as the only land masses.

Since the term "Ocean World" is not an official Imperial classification of the Administratum but simply a label used to describe the planet's predominant environmental feature, most Ocean Worlds that have been settled by Mankind are officially classified as Civilised Worlds, Feral Worlds or even Death Worlds if the environmental conditions or extant marine biosphere are hostile enough to human life.

Ocean Worlds often produce hardy peoples superbly adapted to combat in marine environments and so become prime recruiting grounds for the Astra Militarum when it needs regiments for amphibious or underwater operations.

Notable Ocean Worlds[]

Planet Name Segmentum Sector Sub-Sector System Population
Altaneum Brun Unknown Unknown Unknown Unknown
Archipelaga Ultima Segmentum Unknown Unknown Unknown Unknown
Brun Unknown Unknown Unknown Unknown Unknown
Duthovan Unknown Unknown Unknown Unknown Unknown
Eleusis Segmentum Ultima Jericho Reach Unknown Unknown Unknown
Isla'su Ultima Segmentum Eastern Fringe Unknown Unknown Unknown
Ithaka Segmentum Obscurus Reef Stars Unknown Ithaka System Unknown
Kvariam Alpha Segmentum Ultima Unknown Unknown Unknown Unknown
Mackensee Segmentum Ultima Jericho Reach Unknown Mackensee System Unknown
Manuxet Segmentum Ultima Jericho Reach Unknown Unknown Unknown
Pearl Moon Segmentum Obscurus Calixis Sector Markayn Marches Karrik System 3.5 million (humans and Abhumans)
Pelago Unknown Unknown Unknown Gollim System Unknown
Sapiencia Segmentum Pacificus Sabbat Worlds Rimward Marginals Sapiencia 10,000+ (Estimated)
Spectoris Segmentum Obscurus Calixis Sector Drusus Marches Unknown 2,000,000
Tabius Rasa Segmentum Ultima Jericho Reach Unknown Tabius Rasa System Unknown
Talassar Ultima Segmentum Unknown Ultramar Unknown Unknown
Tyran (destroyed by Hive Fleet Behemoth in 745.M41) Eastern Fringe (Ultima Segmentum) Unknown Unknown Tyran System N/A
Wrath Segmentum Ultima Unknown Unknown Unknown 108 Million (Estimated)

Sources[]


Worlds of the Galaxy
General/Environmental Classifications Chem WorldDead WorldDeath WorldDesert WorldDerelict WorldIce WorldForest WorldJungle WorldMountain WorldOcean WorldRad WorldSwamp World
Imperial Classifications Abattoir WorldAdeptus Astartes HomeworldAgri-worldAnchor WorldArboreal WorldArchive WorldArmoury WorldAstropathic Relay StationBattery WorldCardinal WorldCemetery WorldCivilised WorldDelverworldFeral WorldFeudal WorldForbidden WorldForge WorldFortress WorldFrontier WorldHive WorldHub-FortressIndustrial WorldKnight WorldLabyrinth WorldLumber WorldMenagerie WorldMerchant WorldMining WorldPenal WorldPenitent WorldPleasure WorldQurantined WorldQuarry WorldRefugee WorldRepository WorldResearch StationSentinel WorldShrine WorldWar WorldWaste World
Chaos Classifications Daemon WorldHell-ForgeFallen Knight World
Xenos Classifications CraftworldCrone WorldExodite WorldHold WorldKin WorldMaiden WorldOrk WorldT'au SeptSept WorldTomb WorldXenos World
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